If a 7 kg bowling ball is lifted 2 m into the air and dropped, what speed will it strike the ground? (

Answers

Answer 1

Answer:

6.32m/s

Explanation:

note:Now these calculations are based in the fact that acc. due to gravity is 10m/s²

okay so I'm thinking you think the speed of a body depends on the mass of the body also,umh... well it doesn't at all!

when two bodies of different masses fall from the same height,they fall at the same time( this is just to say)

now enough of the talking let solve....

so the ball was dropped .ie from rest to the ground through a distance of 2m,

the formula for calculating the distance if a body moving in a straight line is given by:

S=ut + ½at² where u is initial velocity, a is acceleration ( of the body or due to gravity, but since its falling freely under the influence of gravity its " we use the acceleration due to gravity ,which is 10m/s²) and t is the time taken to cover the distance.

from our question the ball was dropped from rest thus its u is 0 therefore we use this equation to find the time it took to touch ground (S=½at²)

solving ....

we get t to be 0.632s

to find the speed we substitute t in the equation below:

V=u+at ,but since u=0

V=at =10•0.632=6.32m/s

therefore the speed the body uses to strike the ground is 6.32m/s


Related Questions

Select the correct location on the image.
Which color in the visible spectrum has the highest frequency?

Answers

Answer:

Violet I took the test and it was right

Answer:

Violet the dude above was correct i took the test and got it right

Explanation:

Potential Energy: A cat which weighs 10 kg walks up a ladder. The ladder has a height of 15 m. How many joules of gravitational
potential energy does the cat have?

Answers

20 espero que esto te ayude por que yo ya lo hice jsjsjs

A 4kg object has a momentum of 12 kg*m/s, what is the objects velocity?

Answers

Momentum = mass x velocity
12 = 4 x v | ÷ both sides by 4
12 ÷ 4 =v
v= 3 m/s

number of atoms of each element ammonium hydroxide?​

Answers

Answer:

Explanation:

Ammonium Hydroxide has the chemical formula of

NH4OH

There is 1 Nitrogen (N) = 1

There are 5 Hydrogens (H) = 5

There is 1 Oxygen  (O) = 1

In total, there are 7 atoms in 1 molecule of NH4OH

A television that requires an average of 0.40 ampere of current is operated on a
120-volt service for 5.0 hours. How much energy is used?
a. 1.5 kWh
b. 0.15 kWh
C. 0.24 kWh
d. 0.67 kWh

Answers

The energy that has been used is 0.24 kWh

Sam goes to a friend's house by bike. His friend's house is 350m away. The journey takes 50s. What is Sam's average speed?

Answers

V=d/t
V=350m/50s
V=7m/s

Answer:

Sam's average speed was 7ms-1

Explanation:

speed= distance / time

speed= 350 / 50

speed= 7 metres per second.

An old woman is worried about time. She walks at a rate of 2 meters per second and travels a
distance of 454 meters. How long does it take her to complete the motion?


Please help ASAP!! BRAINLIST please explain thankyou!!!

Answers

Answer:

227 seconds.

Explanation:

Speed is equal to distance divided by time. s = d/t

We can rearrange this algebraically to solve for the time it will take to cover a certain distance at a certain speed. Time is equal to distance divided by speed.  t = d/s

Then we substiture our known values for the variables and solve for our unknown.

t = 454m / 2m/s = 227s

Answer:

If the lady is traveling 2 meters per second and she travels 454 meters then you will have to divide 454 by 2 to get the amount of time she walked.

454 divided by 2 = 227

This means that the lady traveled for 227 seconds or about 3.78 minutes.

10-kg box is sliding across an ice rink at 10 m/s . A skater exerts a constant force of 10 N against it. How long will it take for the box to come to a complete stop?

Answers

Answer:

Time, t = 10 seconds

Explanation:

Given the following data;

Mass = 10kg

Force = 10N

Final velocity = 10m/s

Initial velocity = 0m/s

To find the time;

First of all, we would find the acceleration of the box.

Force = mass * acceleration

10 = 10 * acceleration

Acceleration = 10/10 = 1m/s²

Now, we can find the time by using the first equation of motion;

V = U + at

10 = 0 + 1t

10 = t

Time, t = 10 seconds

Therefore, it will take 10 seconds for the box to come to a complete stop.

Click on the graphic below until the correct answer appears.
Which applies to a real machine?

Answers

Answer:

there is no graphic

Explanation:

it is made up of small particles

Answers

Answer:

Everything is made up of tiny particles called Matter

Calculate the force that the 4kg block exerts on the 10kg block

Answers

acceleration=force/mass=28/(10+4)=2m/s^2

force10kg=ma=10*2
force4kg=ma=(10*2)=20
the4 kg is pushing against the 10kg block

vf=vi+at
-10=20*28/14 * t
t=30/2=15sec

i hope this can help you.

A car moving 20 m/s accelerates to pass
a truck. Five seconds later the car is
moving 30 m/s. What is the acceleration
of the car?
A. 5 m/s
B. -5 m/s
C. -2 m/s
D. 2 m/s
Gooooo

Answers

The answer is 2m/s.
The equation is a=(vf-vi)/2

What sort of force is magnetism?
pls help ASAP :)
no links pls​

Answers

Answer:

Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.

why do we tilt umbrella in rain. Explain​

Answers

Answer:

Rain is falling vertically. A man running in the road keeps his umbrella tilted but a man standing on road keeps his umbrella vertical to protect himself from the rain but both of them keep their umbrella vertical to avoid the vertical sun-rays. ... Thus we can tilt the umbrella to avoid it.

Explanation:

XOXO

Kit

You pull straight up on the string of a yo-yo with a force 0.19 N, and while your hand is moving up a distance 0.12 m, the yo-yo moves down a distance 0.30 m. The mass of the yo-yo is 0.058 kg, and it was initially moving downward with speed 3.4 m/s. (b) What is the new speed of the yo-yo

Answers

Answer:

2.54 m/s

Explanation:

By conservation of energy,

work done by force due to hand = mechanical energy gained by yo-yo

So Fd = mgh + 1/2m(v₂² - v₁²)

where F = force on string = 0.19 N, d = distance moved by hand = 0.12 m, m = mass of yo-yo = 0.058 kg, g = acceleration due to gravity = 9.8 m/s², h = distance moved by yo-yo = 0.30 m, v₁ = initial speed of yo-yo = 3.4 m/s and v₂ = final speed of yo-yo = unknown

So,  Fd = mgh + 1/2m(v₂² - v₁²)

Fd/m = gh + 1/2(v₂² - v₁²)

Fd/m - gh = 1/2(v₂² - v₁²)

2(Fd/m - gh) = (v₂² - v₁²)

(v₂² - v₁²) = 2(Fd/m - gh)

v₂²  = v₁² + 2(Fd/m - gh)

taking square-root of both sides, we have

v₂  = √[v₁² + 2(Fd/m - gh)]

Substituting the values of the variables into the equation, we have

v₂  = √[(3.4 m/s)² + 2(0.19 N × 0.12 m/0.058 kg - 9.8 m/s² × 0.30 m)]

v₂  = √[(3.4 m/s)² + 2(0.19 N × 0.12 m/0.058 kg - 9.8 m/s² × 0.30 m)]

v₂  = √[(3.4 m/s)² + 2(0.0228 Nm/0.058 kg - 9.8 m/s² × 0.30 m)]

v₂  = √[(3.4 m/s)² + 2(0.393 Nm/kg - 2.94 m²/s²)]

v₂  = √[(3.4 m/s)² + 2(-2.547 m²/s²)]

v₂  = √[11.56 m²/s² - 5.094 m²/s²)]

v₂  = √[6.466 m²/s²]

v₂ = 2.54 m/s

Please help!!!! It's due today!!!

Answers

p=300kg x 4m/s^2= 1200kg m/s?

In which situations is elastic potential energy present

Answers

Answer:

if positioned at height

Explanation:

just search it online

Answer: 1st, 4th, and 6th choice

A bow is drawn back from its equilibrium position.

A spring toy dart gun is loaded with a dart.

A bungee cord is stretched with a person at the end.

Explanation:

If these are the choices...

A bow is drawn back from its equilibrium position.

An arrow rests on a bow.

A spring toy dart gun is unloaded.

A spring toy dart gun is loaded with a dart.

A bungee cord is connected to a tall tower.

A bungee cord is stretched with a person at the end.

Edge 2021

Light travels from air into a swimming pool. How does its speed change?

Answers

Answer:

D

Explanation:

Answer:

D

Explanation:

it would move at the same speed because light makes it go at the same speed

A 15 W electric shaver is used for 3 minutes. How much energy does it use in joules?​

Answers

P=change in E/t
Change in E=p*t
=15*3
=45

The answer is 45J.

What method is used when you try several different solutions to see what
works?
A. Trial and error
B. Stages
C. Heuristic
D. Rational

Answers

Answer:

A

Explanation:

Trial and error is basically trying something, if it works, great. If it does not work, try another way.

Answer:

A. Trial and error

Explanation:

The other user is correct.

How much impulse is applied by a 25 N force in 30 seconds?

Answers

[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Impulse.

Impulse is denoted by 'J'

hence, J = F. dt

so we get as,

J = (25)*(30)

J = 750 N-s

===> hence the impulse is 750 N-s

Impulse is applied by a 25 N force in 30 seconds is 750 N-s.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Concept of the Impulse.

Impulse is denoted by 'J'

hence, J = F. dt

so we get as,

J = (25)*(30)

J = 750 N-s

hence the impulse is 750 N-s

Impulse is applied by a 25 N force in 30 seconds is 750 N-s.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ2

Using the image, which area of the ocean floor would have the largest amount of pressure? Explain

Answers

Answer: the area were the most pressure is at the deep sea trench (the deepest part)

Explanation: because the more on top of you is the more pressure.

In 1965, a group of students wore black arm bands to school in protest of American policies in Vietnam. Administrators banned the wearing of armbands on school grounds; however, the students wore them again and were suspended. A lawsuit followed, and the case was eventually taken to the Supreme Court.

Answers

Answer:

protected under students first amendment rights

Explanation:

did the studyisland :)

Astronomers build optical telescopes on tops of mountains because a. there is less air to dim the light. b. the seeing is better. c. CCDs work better with a beautiful mountain view. Astronomers build optical telescopes on tops of mountains because a. there is less air to dim the light. b. the seeing is better. c. CCDs work better with a beautiful mountain view. all choices, a, b and c choice c only choice a only choice b only choices a and b

Answers

Answer: choices a and b

Explanation:

Telescope can be defined as am optical instrument which is designed to observe the distant objects clear and nearer. It comprises of arrangement of lenses which allow the rays of light to be collected. The collected light is focused and the image so produced is magnified in the form of an image. The telescopes are prepared and manufactured on mountains top as this will help in preventing the distortion of light obtain from the star due to the fluctuation of air mass in the atmosphere. The atmospheric distortion affects the resolution, and affects the vision. The atmospheric pressure is low at the mountain tops so it will help in better observation of the sky.

GIVING BRAINLIEST IF YOU ANSWER CORRECTLY!! (20 pts!!)

Answers

Answer:

c 1386J

Explanation:

You use the formula MCΔT where m is mass, C is specific heat, and delta t is change in temperature

What will be the change in velocity of a 850 kg car if a force of 50,000N is
applied for 0.5 s? (Round to one decimal)

Answers

Answer:

i'm not quite sure

Explanation:

just grive me a sec

Answer:

29.4 m/s

Explanation:

f = ma

a = [tex]\frac{f}{m}[/tex]

a = [tex]\frac{50000}{850}[/tex]

a = 58.8 [tex]m/s^{2}[/tex]

a = [tex]\frac{change in velocity}{t}[/tex]

change in velocity= at

change in velocity = 58.8 × 0.5

change in velocity = 29.4 m/s

What work is the person doing doing to the box if the box is just being held and it is not moving?

Answers

Allowing for a platform in which the box holds potential energy

Giving brainliest!! if you answer correctly :) (30pts)

Answers

Answer:

32000joule.

Explanation:

given

mass. (m)=160kg

speed (v)=20m/s

now

kinetic energy =1/2 (mv²)=1/2 ×{160×20²}=32000joule.

Answer:

Explanation:

Ke = 1/2 mv2

Ke = 1/2(160)(20)2

= 1/2(160)(400)

= 32000J

Option B is the correct answer

After being pushed and released, a 50 kg crate slides across a factory floor. Friction on the sliding crate is 200 N, what is the crates acceleration ?

Answers

F = ma
200 = 50 * a
4 = a

Therefore acceleration is 4ms^-2

To Calculate Velocity and Average Velocity you can use the same formula as both.

True Or False?

Answers

Answer:

I believe it's True!    Brainliest??

Explanation: Hope you have a great day :)

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