Which statement is true concerning the ball when it is at C, the highest point i
ID: 1414506 • Letter: W
Question
Which statement is true concerning the ball when it is at C, the highest point in its trajectory? (a) The ball's velocity and acceleration are both zero. (b) The ball's velocity is perpendicular to its acceleration. (c) The ball's velocity is not zero, but its acceleration is not zero. (e) The horizontal and vertical components of the ball's velocity are equal. At which point is the velocity vector changing most rapidly with time? (a) A (b) B (c) C (d) D (e) It is changing at the same rate at all four points. An apple crate with a weight of 225 N accelerates along a frictionless surface as the crate is pulled with a force acting on the top of its path is true? (a) it is equal to the weight of the rock. (b) It is instan taneously equal to zero newtons. (c) its direction changes from up to down. (d) It is greater than the weight of the rock. (e) It is less than the weight of the rock, but greater than zero newtons.Explanation / Answer
At highest point, Ball's horizontal velocity exist while the vertical acceleration,g acts in downward direction.So, Ball's velocity is perpendicular to its acceleration.
Option B is correct.
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