Question

Check all the boxes that correspond to forces doing zero work

Part A gravity acting on a projectile that has been launched straight up

You pushing your stalled car, but it doesn't budge

Drag acting on a plane flying horizontally

gravity acting on your car as it drives horizontally

An olympic weightlifter holding a barbell above their head (the barbell is motionless)

sliding friciton acting on a car slilding to a stop

Answer 1

For the following statements the work done is zero.

1. You pushing your stalled car, but it doesn't budge.
2. gravity acting on your car as it drives horizontally.
3. An olympic weightlifter holding a barbell above their head (the barbell is motionless).