Question

why does a spanner have a long handle?the mats used in gyms and the padding used in sports uniforms are made up of soft substances.why are rigid materials not used?

Answer 1

spanner has long handle as the torque produced in rotating it is large even for small force applied as torque= force * perpendicular length
soft substances are used to reduce the rate of change of momentum of the people when they fall etc. this is because of Newton s second law