Question

A ball falls down from the top of a height of 70m.
How much time the ball will take to reach the ground?

Answer 1

• Height=h=70m
• Acceleration due to gravity=g=9.8m/s²
• Time be t

Apply second equation of kinematics

• h=1/2gt²
• gt²=2h
• 9.8t²=2(70)
• t²=140/9.8
• t²=14.3
• t=3.78s