Can an object have a velocity with zero acceleration? Can an object have acceleration with zero velocity? Explain why or why not.

A ball is thrown up with an initial speed of 43.0 m/s a) what is the ball's speed at its highest position? b) how long does it take the ball to reach its highest position? c) what is the magnitude of the ball"s acceleration at its highest position? d) what is the distance between the initial and highest position of the ball? e) what is the ball's speed when it comes back to its initial position?

Which of the following descriptions corresponds to a ball tossed vertically upward? Air resistance can be neglected. a. The velocity decreases linearly from v_0 to v_f, with v_0>0 and v_f<0. b. The velocity increases linearly from zero to v_f. c. The position first increases linearly and then decreases linearly as a function of time. d. The acceleration decreases linearly from g to zero.

Page < c. The acceleration is +1.5 m/s². d. The acceleration is +3.0 m/s². e. The acceleration cannot be determined. 2 Multiple Choice Questions 1. A car enters a 25-m intersection travelling with a velocity 5 m/s in the west direction. When it clears the intersection (after it covers the 25-m), it is travelling with a velocity of 10 m/s still in the west direction. What is the acceleration of the car? Assume that east is in the positive x-axis and west is in the negative x-axis. a. The acceleration is -9.81 m/s. b. The acceleration is -1.5 m/s².