Abullet is fired through a 14.0 cm thick board, with its line of motion perpendicular to the face of the board. if it enters with a speed of 450 m/s and emerges 220m/s, what is the bullet’s acceleration as it passes through the board?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

Describe uniform velocity and variable velocity in short

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.