KinematicsMedium

Question

The acceleration - time graph of a particle moving along a straight line is as shown in figure. At what time particle acquires its initial velocity ?
   

Options

A.12
B.5 sec 
C.8 sec
D.16

Solution

Upward area of a - t graph gives the change in velocity = 20 m/s. To acquire initial velocity, it again has to change by same amount in negative direction. 
 Slope of curve = -10/4 = -2.5
   
∴ time = = 4 sec
Total time = 4 + 4 = 8 sec

Create a free account to view solution

View Solution Free
Topic: Kinematics·Practice all Kinematics questions

More Kinematics Questions

A ball is thrown upwards. It returns to ground describing a parabolic path. Which of the following remains constant?...A ball is thrown from bottom of an incline plane at an angle a from the inclined surface up the plane. Another ball is t...At what angle should a body be projected with a velocity 24 ms-1 just to pass over the obstacle 14 m high at a distance ...A bomb is released from a horizontal flying aeroplane. The trajectory of bomb is...Rain is falling vertically downwards with a vecolty of 3km/hr.A man walks in the rain with a velocity of 4km/hr. The rai...