Why the car floated before it started to sink? Explain.

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.

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine