Physics for IGCSE & O level - Forces And Motion (Section 6 - No. 41)
Which of the following is an example of balanced forces?
A book sliding across a table.
A rocket accelerating upwards.
A parachute descending at constant velocity.
A car speeding up on a road.
Vysvětlení
A parachute descending at constant velocity is an example of balanced forces because the force of gravity is balanced by the force of air resistance.