Question

explain why a bicycle can be slowdown by dragging your feet along the ground.

Answer 1

if you drag your feet along the ground it will create a opposite force to the direction of force of cycle

Answer 2

FRICTION!.. FRICTION IS THE MAIN REASON FOR THAT .....

due to friction(force applied by our feet when they touch the ground) which is the force applied opposite to the direction of motion so the speed is reduced..

Hope this helps you out!!