A 45 kg boy is riding a 15 kg bicycle with a speed of 8.0 m/s. What is the combined kinetic energy of the boy and the bicycle?

To travel at constant speed, a car engine provides 24kw of useful power. the driving force on the car is 600n. at what speed does it travel?

Aregular polygon has angkes of size 150° each.how many side has the polygon

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.