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 distance from the starting point in meters 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 distance from the starting point in meters is
A) 0.
B) 2.
C) 4.
D) 8.
E) 16.

Quizplus · Accepted Answer

Using the formula for distance travelled by a uniformly accelerating object:
distance = (1/2) x acceleration x time^2 
distance = (1/2) x 4 m/s^2 x (2 s)^2 
distance = 8 meters 
Therefore, the ball has travelled 8 meters from its starting point after 2 seconds. Thus, the correct answer is choice D.

The Acceleration of a Ball as It Rolls Down a Ramp