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3 years ago

Which force causes a wagon to speed up as it rolls down a hill?

Physics

2 answers:

Temka [501]3 years ago

7 0

Gravity is the only one helping it.

Delicious77 [7]3 years ago

6 0

Answer: The correct answer is force of gravity.

Explanation:

Gravity is the force with which one body attracts the other body.

It goes down a hill with the increase in the kinetic energy. The kinetic energy is due to the motion of a wagon.

At the hill the gravity is lesser in comparison to the gravity on the surface of the earth.

When a wagon rolls down a hill it speeds up. Here, the earth attracts the wagon with the force of gravity. It accelerates down a hill with an acceleration due to gravity.

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Answer:

$\omega_f=571.42\ rpm$

Explanation:

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$\alpha =\dfrac{a}{r}$

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Using the third equation of rotational kinematics as :

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Here, $\omega_i=0$

$\omega_f=\sqrt{2\alpha \theta}$

$\omega_f=\sqrt{2\times 45.46\times 39.39}$

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$\omega_f=571.42\ rpm$

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