Question

hi what will be the answer ​

Answer 1

Answer:

1. Athletes and mountaineers have spikes in their shoes to improve grip on the ground

2. Pedals of a bicycles, the steering wheel of a car and the handle of a knife all have rough surface to increase friction.

3. When we ride a bicycle the brake pads do not touch the wheels but when we press the break lever these pads arrest to motion of the rim due to friction the wheels stop moving.

Answer 2

Answer:

what's this , what do you mean by this question