Which one of the following is false: a) a body can have zero velocity and still be accelerated. b) a body can have constant velocity and still be accelerated .

c) the direction of the velocity of a body can change when its acceleration is constant

d)a body can have constant speed and still have varying velocity

Explanation:

Speed is a scalar quantity that only number and velocity is a vector which means having magnitude and direction both. In order to have constant velocity the speed needs to be constant. Whereas a body can have constant speed with changing direction (velocity).

When car going roundabout is the perfect example of this situation. 

6 cos 34, 6 sin 34 trig

v 154.9= 0.9 length length s little over 154.9cm