In kinematics, the velocity function is all of the following except  A. Function of time  B. Function which gives the instantaneous velocity  C. The derivation D. None of the above

A rock is thrown straight upward, then falls back down. Consider the motion of the rock from the time just after it is thrown, to the time just before it hits the ground. Neglect air resistance. Which of the following quantities is zero at least one point in the rock’s flight?  A. Neither acceleration, nor velocity   B. Acceleration   C. Velocity   D. Both acceleration and velocity  Which of the following quantities changes direction during the rock’s flight?  A. Neither acceleration, nor velocity   B. Acceleration   C. Velocity   D. Both acceleration and velocity  Which of the following quantities is constant during the rock’s flight?  A. Neither acceleration, nor velocity   B. Acceleration   C. Velocity   D. Both acceleration and velocity

1. If some dude’s position is ~x = −10 m and the dude is moving away from the reference point, but is slowing down, which of these are true about the dude’s velocity and acceleration? A. Both are positive B. Velocity is positive, but acceleration is negative C. Velocity is negative, but acceleration is positive D. Both are 1. If some dude’s position is ~x = −10 m and the dude is moving away from the reference point, but isslowing down, which of these are true about the dude’s velocity and acceleration?A. Both are positiveB. Velocity is positive, but acceleration is negativeC. Velocity is negative, but acceleration is positiveD. Both are negative

4. In velocity versus time graph, what does the slope of the line between two points represents: a. The average velocity. b. The average speed. c. The average acceleration. d. The instantaneous velocity. e. The instantaneous velocity. Explain your reasoning:

On the earth, an astronaut can safely jump to the ground from a height of 1.0 m; her velocity when reaching the ground is slow enough to not cause injury. From what height could the astronaut safely jump to the ground on the moon?A. 2.4 m B. 6.0 m C. 7.2 m D. 36 m

A ball is thrown straight upward, and it reaches a maximum height of 2.80 seconds.   b). What is the maximum height reached by the ball shown in a formula showing what the variables are defined as in a diagram?