a man throws a ball with the same speed vertically upwards but after the other at an interval of 2 seconds what should be the speed of the true so that more than two balls iron sky tenida given g equals to 10 metre per second square

Asked by seshukumari.cheeda | 29th Jul, 2019, 12:44: PM

Expert Answer:

The initial velocity with which the two balls has to be thrown so that atleast two balls are in the sky is given by first equation of motion,
 
Thus, 
v = u + at 
v = 0 when the ball reaches the maximum height.
Thus, 
0 = u + gt 
g =10 m/s2
and time interval t = 2s 
Thus, 
u = -gt = -10 x 2 = 20 m/s 

Answered by Shiwani Sawant | 29th Jul, 2019, 04:38: PM