Question

Athletes wear shoes having spikes on the . give reason

Answer 1

to have maximum friction with ground and also to have maximum opposite reaction

Answer 2

HEY MATE, HERE IS YOUR ANSWER
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While running, athletes must make sure that they don't slip and they get a good speed by gripping in the ground hardly.
Actually ,it is friction which does the work in moving the athlete forward while running.As those spikes increases friction, athletes wear it to get a higher speed.