A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the left as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal acceleration? a. The ball has a negative acceleration when rolling both up and down the ramp. b. The ball has a positive acceleration when rolling up the ramp and a negative acceleration when rolling down the ramp. c. The ball has a negative acceleration when rolling up the ramp and a positive acceleration when rolling down the ramp. d. The ball has a positive acceleration when rolling both up and down the ramp.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the left as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal acceleration?
a. The ball has a negative acceleration when rolling both up and down the ramp.
b. The ball has a positive acceleration when rolling up the ramp and a negative acceleration when rolling down the ramp.
c. The ball has a negative acceleration when rolling up the ramp and a positive acceleration when rolling down the ramp.
d. The ball has a positive acceleration when rolling both up and down the ramp.
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