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ElenaW [278]
3 years ago
9

Question 29 of 43

Physics
1 answer:
liraira [26]3 years ago
3 0
I agree with the first responses
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A 1300 kg car starts at rest and rolls down a hill from a height of 10.0 m. It then moves across a
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Answer:

0.51 m

Explanation:

Using the principle of conservation of energy, change in potential energy equals to the change in kinetic energy of the spring.

Kinetic energy, KE=½kx²

Where k is spring constant and x is the compression of spring

Potential energy, PE=mgh

Where g is acceleration due to gravity, h is height and m is mass

Equating KE=PE

mgh=½kx²

Making x the subject of formula

x=\sqrt {\frac {2mgh}{k}}

Substituting 9.81 m/s² for g, 1300 kg for m, 10m for h and 1000000 for k then

x=\sqrt \frac {2*1300*9.81*10}{1000000}=0.50503465227646m\\x\approx 0.51 m

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3 years ago
Playing soccer on a beach will require more effort because the sand causes a great deal of _______ to the ball.
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Answer:

I believe the answer to be B

Explanation:

If you were playing on grass, the ball would be able to roll around much easier rather than it to be on sand. If it's wrong I am so sorry

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Answer: A and C (i took the test)

Explanation: Hope this helps:)

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Why are vectors important in physics?
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