Three speed-time graphs are given below :Which graph represents the ca

1.	Three speed-time graphs are given below :Which graph represents the case of: (i) a cricket ball thrown vertically upwards and returning to the hands of the thrower ? (ii) a trolley decelerating to a constant speed and then accelerating uniformly ?
Answer» (i) Graph (c): The speedof the ball goes on decreasing uniformly as it moves upward zero at the highest point, and then increases uniformly as it moves downward. (ii) Grap(a): The speed of the trolley decreases uniformly, then it moves at a constant speed, and then the speed increases uniformly.

Three speed-time graphs are given below :Which graph represents the case of: (i) a cricket ball thrown vertically upwards and returning to the hands of the thrower ? (ii) a trolley decelerating to a constant speed and then accelerating uniformly ?

Answer»

(i) Graph (c): The speedof the ball goes on decreasing uniformly as it moves upward

zero at the highest point, and then increases uniformly as it moves downward.

(ii) Grap(a): The speed of the trolley decreases uniformly, then it moves at a constant speed, and then the speed increases uniformly.