(With Solutions)

1.Two cars leave from the same place at the same time and travel in opposite direction. One car travels at 55 mph and the other at 75 mph. After how many hours will there be 520 miles apart?

2.A man standing on a lift throws a ball upwards with the maximum initial velocity he can and is found to be equal to 55 m/s. After what time the ball returns to his hand if (a) the lift is stationary, (b) the lift is moving up with a uniform velocity of 7 m/s, (c)the lift is moving down with a velocity of 7 m/s. Also given g = 9.8 m/s2.

3.A bike starting from rest acquires a speed of 40 m/s in 20 seconds. Then, the bike travels with this speed for 15 seconds. Find the (a) acceleration (b) distance travelled during acceleration and (c) the total distance travelled.