When an inclined plane is used, a. the mechanical advantage increases as the height increases. b. a smaller force is exerted over a longer distance. c. a negative mechanical advantage can result. d. a greater force is exerted over a shorter distance

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?