Question

an object is projected upward with the velocity of 100 m/s . it will strike in the ground in about

Answer 1

Answer:

u=100 m/s

v=0 m/s

g=-10 m/s^2

v= u-gt

0=100-10t

t=10sec

so, time taken to reach the ground=10 sec

so, total time to reach the ground=10+10=20sec

Answer 2

Answer:

it will strike the ground after 10 seconds

Explanation:

because when a body is thrown vertically up the final velocity is 0 and the acceleration is -10 meter per second square or -9.8 meter per second square so I used the formula v =u+at