A mass of 5 kg is 100m above a given datum where local g = 9.75 meters per second square. Find the potential energy with respect to the datum. a. 4976J  b. 4877J  c. 4875J  d. 4978J Find the weight in Newtons of the 5 kg mass. a. 49.50N  b. 49.20N  c. 48.75N  d. 48.77N

What is the best description of gravitational potential energy? a. The energy stored, dependent on the object's height from the ground. b. The strength from a moving object. c. The energy exerted through stretching or squashing an object. d. The strength stored between molecules, in chemical bonds.

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

Suppose a 1300-kg elevator car is lifted a distance 45 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 1350 N. 1.Calculate the work done on the elevator by its cable, in joules.  2.Calculate the work done by the gravitational force on the elevator, in joules, during this process.  3.Calculate the total work done on the elevator, in joules.

A 15 kg crate has potential energy of 225j. How high is the crate lifted? Use g= 9.8m/s^2. DONT round your answer and choose one correct answer with the correct unit of measure. a. 22.9591 m b. 0.6533 m c. 1.53061 m d. 15.3061 m

Young Hector launches a 200 gram block uphill on a frictionless ramp which is tilted at 30 degrees with the horizontal, as shown in the Figure. At the instant of its launch, the block is moving uphill at 4.00 m/s. Hector observes as the block travels a distance of 50.0 cm uphill on the ramp. In the following, consider the period of time during which the block moves uphill through the 50.0 cm distance shown in the Figure. For simplicity, assume that g = 9.80 m/2. d (50.0 cm) 4.00 m/s h 30°