Will a non-metal replace a metal?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

How will the system respond to a temperature increase?