Question

question 5 1 pts when an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? a) its acceleration is constant. b) its velocity is constant. c) neither its acceleration nor its velocity is constant. d) both its acceleration and its velocity are constant.

Explanation:

When an object is in free - fall (released from rest and no friction), it is under the influence of gravity. The acceleration due to gravity near the Earth's surface is approximately constant ($g\approx9.8\ m/s^{2}$). The velocity of the object changes over time as $v = v_0+at$, where $v_0 = 0$ (released from rest) and $a = g$. So velocity is not constant.

Answer:

A. Its acceleration is constant.