A. At which point(s) occurs when the cart is at its highest point on the track?

Question

A. At which point(s) occurs when the cart is at its highest point on the track?

B. At which point(s) is when the cart is in contact with the spring?

C. At Which point(s) is the cart is moving down the track toward the origin?

D. At which point(s) is the cart has acceleration of zero?

The graph below shows the velocity graph of a cart moving on an air track as shown in the figure on the right. The track has a spring at one end and has its other end raised. The cart is started sliding up the track by pressing it against the spring and releasing it. The clock is started just as the cart leaves the spring. Take the direction the cart is moving in initially to be the positive x direction and take the bottom of the sp the origin ng ider ir track ring to be 0 --t-time Letters point to six points on the velocity curve. For the physical situations described below identify which of the letters corresponds to the situation described. You may use each letter more than once, more than one letter may be used for each answer, or none may be appropriate. If none is appropriate, put the letter N

Explanation / Answer

(A) At maximum height, velocity will be zero hence point B

(B) When the cart is in contact with spring, its velocity will be greater than zero but in negative direction when it moves downward and in positive direction when it moves upwards hence point A

(C) point C

(D) Acceleration will be zero when cart will be at extrame position ie. point D E F

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