A rifle with a longer barrel can fire bullets with a larger velocity than a rifle with a shorter barrel. a) Explain this using the impulse-momentum theorem. b) Explain this using the work-energy theorem

A spring is stretched to a displacement of 3.4 m from equilibrium. Then the spring is released and allowed to recoil to a displacement of 1.9 m from equilibrium. The spring constant is 11 N/m.

Why is it important for car designers to keep accurate records of their experimental procedures

According to the nebular model, how were planets formed?

PART ONE The arm of a crane at a construction site is 15.0 m long, and it makes an angle of 18.8◦ with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces around the base of the arm.

Imagine the running deer has a mass of 100 kg and is running at a speed of 8 m/s. What is the deer's kinetic energy, in joules?

A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically. Which object is traveling faster when it hits the level ground below if neither of them experiences any air resistance?

Which type of noise has sound at every frequency within the range of human hearing?

The Morpho rhetenor butterfly is shown above. The name Morpho refers to the butterfly's

What is the voltage in a circuit with a resistance of 12 ohms and a current of 20 amp?

You are about to attack a troll in a role-playing game. You will throw w with the letters A through F. In order to bear you will beat the troll? ning game. You will throw two dice, one numbered one to eight and the other gh F.