Physics Test Questions & Answers

Physics Test Questions & Answers A ball is thrown vertically upward and then comes back down. During the ball's flight up and down, its velocity and acceleration vectors are A) always in opposite directions. B) always in the same direction. C) first in opposite directions and then in the same direction. D) first in the same direction and then in opposite directions - CORRECT ANSWER- first in opposite directions and then in the same direction. A baseball is hit upward and travels along a parabolic arc before it strikes the ground. Which one of the following statements is necessarily true? a. The acceleration of the ball decreases as the ball moves upward. b. The velocity of the ball is zero m/s when the ball is at the highest point in the arc. c. The acceleration of the ball is zero m/s2 when the ball is at the highest point in the arc. d. The x-component of the velocity of the ball is the same throughout the ball's flight. e. The velocity of the ball - CORRECT ANSWER- The x-component of the velocity of the ball is the same throughout the ball's flight. A bicyclist is riding at a constant speed along a straight-line path. The rider throws a ball straight up to a height a few meters above her head. Ignoring air resistance, where will the ball land? a. behind the rider b. in front of the rider c. in the same hand that threw the ball d. in the opposite hand to the one that threw it e. This cannot be determined without knowing - CORRECT ANSWER- in the same hand that threw the ball A block is at rest on a rough