A student is standing in an elevator that is accelerating upward. the force that the student exerts on the floor of the elevator must be

Which equation expresses the conservation of mechanical energy in a system that involves kinetic energy, gravitational potential energy, and elastic potential energy?

Fred rides his bicycle 5.1 miles in 21 minutes. What is Fred's average speed (in mi/h) ?

A force sets an object in motion when the force is multiplied

You are a pirate working for dread pirate roberts. you are in charge of a cannon that exerts a force 10000 n on a cannon ball while the ball is in the barrel of the cannon. the length of the cannon barrel is 2.

One complete wave passes a putrefying pile of poached pickerel in 0.50 seconds. The piled pickerel protrude 20 cm along the beach. Calculate its frequency.

What potential increase vac must an electron be accelerated through if the most energetic photon it can emit will scatter off of a stationary electron at an angle ϕ=60∘ with wavelength 8.

Why might the filament lamp inside a lamp melt when a lamp is first switched on?

A 0.6 kg basketball with a velocity of + 6 m/s rolls toward a 0.2 kg ball of clay with a velocity of + 1 m/s. If the balls collide and stick together, what is the velocity following the collision?

What are the disadvantages of dynamo?

Why must indirect evidence be used to study the structure of atoms?