An average person can reach a maximum height of about 60 {\rm cm} when jumping straight upfrom a crouched position. during the jump itself, the person's bodyfrom the knees up typically rises a distance of around 50 {\rm cm}. to keep the calculationssimple and yet get a reasonable result, assume that the entirebody rises this much during the jump. in terms of this jumper's weight w , what force does the ground exert on him or herduring the jump?