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3 years ago

I need help with this question, please

Physics

2 answers:

Andreyy893 years ago

4 0

Calculate the kinetic energy of the ball at the bottom of the ramp, then calculate how high it needs to be in order to have that same amount of potential energy.

Burka [1]3 years ago

3 0

Ok so this is a kinetic and potential energy problem. KE= 1/2*m*v^2 and PE= mgh so we set them equal to each other and get KE=PE so 1/2mv^2=mgh so mass divers out and left with 1/2v^2 =gh so solving for h or height we get
h=(1/2v^2)/g so h= 1/2*(6.5m/s)^2/9.80m/s^2 = 2.16m in height the ball will reach.

Hope this helps! Any questions please just ask!
Please rate to help me out also! Thank you so much!!!

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What are the formulas for Work, KE, GPE and Power?

Katyanochek1 [597]

Answer:

work=f×d

GPE =m×g×h

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3 years ago

Make the following conversion. 34.9 cL = _____ hL. 0.349 0.0349 0.00349 349,000

AnnyKZ [126]

Hey there!

Here is your answer:

The proper answer to this question is option C "0.00349".

Reason:

1 L = 100 cL. Or 1 cL = 0.01 L

34.9 cL = 34.9 / 100 L = 0.349 L

 1 hL = 100 L. 0.349 L = 0.349 / 100 hL = 0.00349 hL

Therefore the answer is option C!

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

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3 years ago

You move a 25 N object 5 meters. How much work did you do ?

olga55 [171]

The answer is 125 Joules

The first thing to take note of is the work equation: W=F×D

Since we already have our force and our distance that will help make this problem easier.

So, W=25*5

W=125

Therefore, our answer is 125 Joules since work is measured in joules

Hope this helped!! :)

3 0

3 years ago

A car is moving at 10 m/s to the right. It accelerates for 10 s after which it is moving at 5 m/s to the left. What was the car'

NNADVOKAT [17]

Answer:

Acceleration, $a=-1.5\ m/s^2$

Explanation:

It is given that,

Initial velocity of the car, u = 10 m/s (in right)

Final velocity of the car, v = -5 m/s (in left)

Time taken, t = 10 s

Let a is the acceleration of the car. It can be calculated using the equation of kinematics. The equation is as :

$v=u+at$

$a=\dfrac{v-u}{t}$

$a=\dfrac{-5-10}{10}$

$a=-1.5\ m/s^2$

So, the acceleration of the car is $-1.5\ m/s^2$ . Hence, this is the required solution.

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3 years ago

If time travel to the future existed, doesn't that mean that the future has already occurred and that we are living in the past?

kodGreya [7K]

Answer:

As of right now the techology has not been invented to time travel

if we were to time travel to the future from where that person travled from would be the past and to them the people from where they came from are living in the past

Explanation:

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3 years ago