Question

If v is the velocity and a is the acceleration,
give an example of a physical situation for
each of the following cases.
a) V not =0, a = 0
b) V = 0, a not= 0
c) V > 0, a < 0
d) V < 0, a > 0

Answer 1

Howdy !!

your answer is ---

(a) when a body move with uniform velocity .
then, v not =0 and a = 0 because there is no change in acceleration .

(b) when a body through upward a vertically thrown object has gravity acting on it (accelerating it downwards at 9.8 m/s/s) while its velocity is zero. which has zero velocity at t = t 0 and non-zero acceleration at t = t 0 .

(c) when, a car move in hills or in inclined surface upward then, v >0 but a<0
because there is a gravity which decrease it acceleration .

(d) this situation is also follow on inclined surface . when car decrease its velocity the gravity pull car toward us due to this acceleration goes into positive .



hope it help you

Answer 2

Answer:

a) A body moving with constant Velocity

b) A ball thrown up to reach the highest point

c) A ball moving upward

d) A ball dropped from a height, moving down