If we drop three watermelons weighing 2 kg, 4 kg and 6 kg respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)
Watermelon weighing 4 kg
Watermelon weighing 2 kg
All three will reach at the same instant.
Watermelon weighing 6 kg
A body is dropped from a certain height at time T=0. It undergoes freefall and reaches the ground at time T=t s. What is the expression for the height h from which the body started its free fall?
Acceleration due to gravity is g.
- south pole
- north pole
A body is thrown up with an initial velocity of 10 m s−1. It reaches a maximum height, h. Find the value of h. [Take acceleration due to gravity, g=10 m s−2]
A ball is thrown vertically upwards at speed of 20 m s−1. Find the time taken by the ball to reach back to the original position. [Take acceleration die to gravity, g=10 m s−2]
- Continuously decreases
- Continuously increases
- First increases then decreases
- First decreases then increases
- Displacement in increasing linearly from the beginning
- Displacement increases linearly after certain time
- Displacement remains constant throughout the process
- None of the above
- none of these