An object is moving north and experiencing an acceleration of 3 m/s 2 south. Whi

Question

An object is moving north and experiencing an acceleration of 3 m/s2 south. Which of the following statements about it are true? Select all that apply.

Question 2 options:

If the object's initial velocity is less than 3 m/s, it will never be moving north.

The object's velocity will turn counterclockwise.

The object will slow to a stop and remain at rest indefinitely.

The object's velocity will change by 3 m/s every second.

Given enough time, the object will slow down, stop, and then speed up.

If the object's initial velocity is 12 m/s, after 3 seconds it will still be moving north.

If the object's initial velocity is less than 3 m/s, it will never be moving north.

The object's velocity will turn counterclockwise.

The object will slow to a stop and remain at rest indefinitely.

The object's velocity will change by 3 m/s every second.

Given enough time, the object will slow down, stop, and then speed up.

If the object's initial velocity is 12 m/s, after 3 seconds it will still be moving north.

Explanation / Answer

By kinematic equation,

vf = vi + a*t

a= (vf – vi)/t

This eqn shows that vf is lesser and lesser per unit second than vi.

So here acceleration is actually deceleration. So object has to stop after some time and again moves in the opposite direction after that.

So, The object's velocity will change by 3 m/s every second, Given enough time, the object will slow down, stop, and then speed up

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