A 34.5-cm-long pendulum with a 280-g bob swings through an angle of 180°, Choose the reference configuration as the point where the pendulum string is vertical. (a) Assuming that the pendulum string remains taut, what Is the gravitational potential energy of the pendulum bob-Earth system when the pendulum string makes an angle of 90° with the vertical? (b) Assuming that the pendulum string remains taut, what is the gravitational potential energy of the pendulum bob-Earth system when the pendulum string makes an angle of 42.0° with the vertical? (c) What is the gravitational potential energy of the pendulum bob-Earth system at the lowest point of the pendulum's motion?

A 5 kg block starts from rest at point A at the top of a 3 m long frictionless ramp angled at 40° above the horizontal. The block slides down the ramp and enters a rough horizontal surface between point B and point C with a coefficient of kinetic friction of 0.30. The block travels a distance of 1.00 m on the horizontal surface before running into a light spring with a spring constant of 900 N/m. A hitting the spring. 40.0⁰ 1.50 m B 1.00 m 1 k = 900 N/m wwwww Using the work-energy theorem, find the speed of the block at point C right before How far will the block compress the spring before coming to rest?

A spring is stretched with a spring constant of 3 N/m until it is extended by 50 cm. What is the elastic potential energy stored by the spring? How much elastic potential energy does a spring store when it is compressed by 0.2 m if it has a spring constant of 5 N/m?

The Slingshot is a ride for two people. It consists of a single passenger cage, two towers, and two elastic bands. Potential energy is stored in the elastic bands and the passenger cage is released. On the way up, this potential energy in the elastic bands is converted into the kinetic energy of the cage. At the maximum height of the ride, the energy has been converted into gravitational potential energy of the cage. The slingshot has two towers of height h = 71 m. The towers are a distance d = 31 m apart. Each elastic band has an unstretched length of L0 = 42 m and a spring constant of k = 295 N/m. The total mass of the passengers and cage is m = 395 kg. The car is pulled down to the ground in the middle of the two towers.

Tom has built a large slingshot, but it is not working quite right. He thinks he can model the slingshot like an ideal spring with a spring constant of 35.0 N/m. When he pulls the slingshot back 0.375 m from a nonstretched position, it just does not launch its payload as far as he wants. His physics professor "helps" by telling him to aim for an elastic potential energy of 17.0 J. Tom decides he just needs elastic bands with a higher spring constant. By what factor does Tom need to increase the spring constant to hit his potential energy goal? factor of spring constant increase: During a follow-up conversation, Tom's physics professor suggests that he should leave the slingshot alone and try pulling the slingshot back further without changing the spring constant. How many times further than before must Tom pull the slingshot back to hit the potential energy goal with the original spring constant? factor of pullback distance increase: In which of the two scenarios does Tom have to pull…

A spring of spring constant k = 12.3 N/m is compressed from it's equilibrium position by 28.1 cm. How much energy is stored in the elastic potential energy of the spring?

In regards to springs and different masses; At what point is the potential energy of the system maximum? At what point is the kinetic energy of the system maximum?

As a 1.5×104 kgkg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 6.3×104 N/mN/m . The spring stretches 33 mm  to stop the plane   What is the elastic potential energy of the spring when the plane comes to a stop?

Determine the percent increase in the potential energy of the spring if it is stretched from 4.00 cm to 8.00 cm?

QUESTION 9 When a spring is compressed or stretched, the elastic potential energy (U=1/2kx²) of the spring: Oa. Stays constant Ob. Decreases Oc Increases Od. Either positive or negative