# PHYSICS 2010 - CH 03 Reading Quiz

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question
The ______ of a vector is always a positive quantity. a. X-component b. direction c. magnitude d. Y-component
c. magnitude
question
Ax is positive if is directed _______; Ay is positive if is directed _______. a. left / up b. right / down c. right / up
c. right / up
question
The acceleration of a cart rolling down a ramp depends on __________. a. the length of the ramp b. both the angle of the ramp and the length of the ramp c. neither the angle of the ramp or the length of the ramp d. the angle of the ramp
d. the angle of the ramp
question
The acceleration vector of a particle in projectile motion ________. a. Vanishes at the particle's highest point. b. Is directed down at all times. c. Points along the path of the particle. d. Is directed horizontally.
b. Is directed down at all times.
question
The acceleration vector of a particle in uniform circular motion __________. a. points tangent to the circle, opposite the direction of motion b. is zero c. points toward the center of the circle d. points tangent to the circle, in the direction of motion
c. points toward the center of the circle
question
The video showed examples of vector operations on which two vector quantities? a. Displacement and acceleration b. Displacement and velocity c. Acceleration and force d. Velocity and force e. Velocity and acceleration
e. Velocity and acceleration
question
You toss a basketball toward the basket. At the highest point of its arc, a. The horizontal component of the velocity is zero. b. The vertical component of the velocity is zero. c. Both the horizontal and vertical components of the velocity are zero.
b. The vertical component of the velocity is zero.
question
An object in circular motion has velocity that is constantly changing. The direction of the acceleration is a. Parallel to the motion, along the circle. b. Away from the center of the circle. c. Toward the center of the circle.