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

Using the formula v = u + at, where v is final velocity, u is initial velocity (which is 0 in this case), a is acceleration, t is time, we get:
v = u + at
v = 0 + 4(2)
v = 8
Therefore, the velocity acquired after starting from rest in 2 seconds is 8 m/s.

The Acceleration of a Ball as It Rolls Down a Ramp