Can someone please help me with 1 , 2 & 3 I need help I will mark brainless .

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.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

When using the scientist method, which step comes last?