Question

how many meters will a 2kg ball starting from rest falls freely in one second

Answer 1

A ball of mass 2kg is freely falling from a certain height.

• initial velocity of ball becomes zero.

i.e., u = 0

• acceleration acts on falling ball = Acceleration due to gravity.

i.e., a = g = 10m/s²

now, applying formula,

S = ut+ 1/2at²

here, u = 0 , a = g = 10m/s² and t = 1 sec

so, S = 0 × 1 + 1/2 × 10 × 1²

S = 5 m

Hence, ball has fallen 5m downward.