PHYS 1007 Study Guide - Midterm Guide: Euclidean Vector, Kinematics, Isoniazid

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero?

A)The horizontal and vertical components of its velocity are zero.

B) Its velocity is perpendicular to the acceleration.

C)The horizontal component of its velocity is zero.

D)Its velocity and acceleration are both zero.

At the top of the trajectory of a projectile, the directions of its velocity and acceleration are:

A) Perpendicular to each other

B) parallel to each other

C) inclined tpo each other at the angle of 45o

D) Anti-parallel to each other

Two balls are thrown from the top of a building. Ball 1 is thrownstraight down, and ball 2 is thrown with the same speed, but upwardat an angle theta with respect to the horizontal. Consider themotion of the balls after they are released. Which one of thefollowing statements is true?


A.) The acceleration of Ball 2 decreases as it rises, becomes zeroat the top of the trajectory, and then increases as the ball beginsto fall toward the ground.
B.) Both balls have the same acceleration at all times.
C.) Ball 2 has an acceleration in both the horizontal and verticaldirections, but Ball 1 has an acceleration only in the verticaldirection.
D.) The acceleration of Ball 1 becomes larger as it falls, becausethe ball is going faster and faster

The answer is not C**