Question

A rocket is falling in the air with a downward force of 20 N. What is the mass of the rocket?

Answer 1

`2kg`

Explanation:

As the rocket is falling with a downward force of `20N`
Also as the rocket is in air only force due to gravity of earth must be acting on the rocket
`:.20=mg`
`=>20=m×10`
`=>m=2kg`

Note: Here the value of `g` is taken to be `10ms^-2` for convenience. However for precise calculations `g=9.8ms^-2` can be taken.