Suppose you have two equal mass objects both on a gentle incline. One is a glide

Question

Suppose you have two equal mass objects both on a gentle incline. One is a glider on an air track while the other is a ball on a straight slope. The air track and the slope have the same slope angle. You release them at the same time and at the same distance from the bottom of the slope. You note that neither loses any significant amount of energy to friction as the air track has very low friction and the ball rolls down without slipping or sliding. a. Explain what type of energy both objects have just before they are released. Do both objects initially have the same amount of energy?

Explanation / Answer

Here ,

for the glideer ,

as it is sliding on the plane , it will have only the translational kinetic energy.

for the ball , as it is rolling down the incline

the ball will have translational as well as rotational kinetic energy.

Now , in rolling also , as the work done by friction is zero

the total energy of both glider and ball will be same

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