Question

Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10 m/s around the track. Which statement can be made about the pony's acceleration?
A) The pony is decelerating.
B) The rate of acceleration varies.
C) The pony is accelerating around the track.
D) The pony is not accelerating around the track.

Answer 1

C) the pony is acclerating around the track

Answer 2

Ans: C)The pony is accelerating around the track.

Speed is a scalar quantity which expresses how fast an object is moving

Velocity (v)  is a vector which expresses both how fast the object is moving and in what direction it is moving

v = distance/time

Acceleration is the rate of change of velocity, hence it is a vector

a = v/t

A body will accelerate if there is a change either in the magnitude or direction  of velocity or if both change.

Since the pony is travelling around a track (circle) at constant speed, the magnitude does not change however, the direction keeps changing. Hence, the pony will be accelerating around the track.