Question

speed, velocity & acceleration
abdulcebar gumpimus
motion tutorial: speed, velocity & acceleration
bert is traveling
at 30 m/s up,
down and
around.
this is a measure of berts
velocity because it
includes both his speed
and his direction
multiple-choice question
which of the following describes acceleration? (check all
that apply)
decrease speed
change of direction
increase speed
rewatch

Explanation:

Step1: Recall the definition of acceleration

Acceleration is the rate of change of velocity. Velocity is a vector quantity (has magnitude and direction).

Step2: Analyze each option

• Decrease speed: Since speed is the magnitude of velocity, a decrease in speed means a change in the magnitude of velocity. As acceleration is related to the change in velocity (magnitude or direction), this is an acceleration.
• Change of direction: A change in direction of motion means a change in velocity (as velocity is a vector). So, this is an acceleration.
• Increase speed: An increase in speed (magnitude of velocity) implies a change in velocity. Thus, this is an acceleration.

Answer:

Decrease speed, Change of direction, Increase speed.