Physics for IGCSE & O level - Forces And Motion (Section 8 - No. 31)
What is the reaction force if an athlete pushes off the ground to jump?
The athlete's weight.
The ground pushing the athlete upwards.
The air resistance on the athlete.
The athlete's push on the ground.
Paskaidrojums
According to Newton's third law, the reaction is the ground's force on the athlete.