Question

a body is thrown horizontally with the speed of 10m/s from the building having height of 20 m then the time it will take to reach the ground while neglecting air friction .(take g=10m/s square)

Answer 1

Answer:

2 seconds

Explanation:

Initial velocity = Velocity at max height = 0

Distance = ut+1/2*a*t^2

20 = 0*t + 1/2*10*t^2

20 = 5*t^2

4 = t^2

√4 = t

2 = t

So, time taken is hence equal to 2 seconds.