Question

1. (a) Can an object have zero velocity and still be accelerating?
(b) Can an object have constant velocity and still have a varying
speed? (c) Can the velocity of an object reverse direction when
the object's acceleration is constant? (d) Can an object be in-
creasing in speed as its acceleration decreases?

Answer 1

Explanation:

1)yes

2)no

3)yes

4)yes

Answer 2

Answer:

(a) Yes, an object can have zero velocity and still be accelerating simultaneously. ... When the object stops for a moment, its velocity at that instant is zero, therefore no motion in either forward or backward direction. However the acceleration is still acting on it.

(b)

Answer: Speed is the rate of change of distance and velocity gives the rate of change of displacement, i.e, its magnitude is speed as well as it has direction. Hence, a body can have constant speed and still have varying velocity. ... Hence, a body having constant velocity will not have varying speed.

(c) Yes, the velocity of the object can reverse direction when its acceleration is constant. For example consider that the velocity of any object at any time t is given as: v(t) = t – 2.

(d)Yes, an object can be increasing in speed as the acceleration decreases. ... Theoretically, acceleration is the rate of change of velocity while speed is the magnitude of the velocity.