1. Explain why sportsmen use shoes with spikes.
a. Sporting individuals wear shoes to boost traction on surfaces.
b. Spikes in the shoes friction.
2. Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
a. A heavier object creates friction.
b. Seema has to exert force.