The acceleration of a ball as it rolls down a ramp is 4 m/s 2 . The ball is referred to 2 s after it starts to roll.
-The velocity acquired after starting from rest in m/s is
A)0.
B)2.
C)4.
D)8.
E)16.

Question

The acceleration of a ball as it rolls down a ramp is 4 m/s 2 . The ball is referred to 2 s after it starts to roll. 
-The velocity acquired after starting from rest in m/s is
A)0.
B)2.
C)4.
D)8.
E)16.

Quizplus · Accepted Answer

The velocity acquired by an object starting from rest with constant acceleration is given by the formula v = at. Here, a = 4 m/s² and t = 2 s, so v = 4 * 2 = 8 m/s.

The Acceleration of a Ball as It Rolls Down a Ramp