Question

Give one example each of the type of motion, when?
(a) Accelaration is positive
(b) The area under veloocity- time graph
(c) Accelaration is zero

Answer 1

a) the body moving from initial to final point.
b. No idea.
c. when the body moved in circular path.

Answer 2

A-when an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. B- distance and the displacement is the area under the velocity-time graph. C- acceleration is the change in velocity of an object per unit time. So if the velocity remains constant for particular time period, then the change in velocity per unit time is zero. Therefore, the acceleration is zero. Hence, constant velocity is an ex of the zero acceleration with non zero velocity.