Question

speed in a particular direction
force
motion
velocity
question 5
2 pts
object a represents a light object (weighs less than normal)
before force: object a is traveling at medium speed to the right
during force: a medium force is exerted on object a to the left
after force: object a is thrown in the other direction, now traveling slowly to the left
correct
not correct

Explanation:

Velocity is defined as speed in a particular direction. Force is a push or pull. Motion is the act of moving. So the term for speed in a particular direction is velocity.

According to Newton's second law \(F = ma\) (where \(F\) is force, \(m\) is mass, \(a\) is acceleration). Since the object is light (has a small mass), a medium force should cause a relatively large acceleration. When a medium force is exerted to the left on an object moving to the right at medium speed, the object should first slow down (decelerate) until its velocity becomes zero and then start accelerating to the left. Given the force is medium and mass is small, the final speed (after the force is applied) should be relatively large (not slow) when moving to the left. So the description “now traveling slowly to the left” is not correct.

Answer:

C. Velocity