A cart is only able to move along a straight line. A varying net force along the direction of motion is exerted on the cart. The cart’s velocity as a function of time is shown in the graph below. The five labeled points divide the graph into four sections. Which of the following correctly ranks the magnitude of the average acceleration of the cart during the four sections of the graph?
CD > AB > BC > DE
BC > AB > CD > DE
AB > BC > DE > CD
CD > AB > DE > BC
You are throwing a ball straight up in the air. Which statement best describes the ball’s velocity and acceleration at its highest point.
At the highest point, velocity and acceleration are zero.
At the highest point, velocity is nonzero but its acceleration is zero.
At the highest point, velocity and acceleration are both non-zero.
At the highest point, acceleration is non-zero, but its velocity is zero.
A physics student notices she has a marble in her pocket from class. As she is strolling home, she throws it up and catches it in her hand. Which of the following displacement time graphs correspond to the vertical motion of the marble?
A
B
C
D
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