how do you use conservation of energy to find the change in the gravitational potential of a cart on an incline that bounces off a mass-spring system
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how do you use conservation of energy to find the change in the gravitational potential of a cart on an incline that bounces off a mass-spring system
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- Question 4 Consider a swinging pendulum. When the pendulum is moving towards its middle point, which of the following statements about its energy is correct? Decreasing gravitational potential energy, constant kinetic energy Increasing gravitational potential energy, decreasing kinetic energy Decreasing gravitational potential energy, increasing kinetic energy Increasing gravitational potential energy, constant kinetic energyA digital animator produces a model of a person jumping on a trampoline. Which measure is a boundary condition of the model? the velocity of the person as they fall back to the trampoline the height of the first jump that the person makes on the trampoline the designation of zero potential energy as the height of the trampoline O the changes that occur in kinetic and potential energyA 0.141 kg baseball leaves a pitchers hand at a speed of 31.5 m/s Part A of the air drag is negligible how much work has the pitcher done on the ball by throwing it express your answer in the appropriate unit
- Why does increasing the height of an incline increase the potential energy of an object? Why does increasing the height of an incline increase the kinetic energy of an object?A string exerts a tension force of 55 N on a 10-kg block as it moves a distance of 5 m up a frictionless incline, as shown. The string pulls parallel to the incline. 55 N 10kg 5m a) Find the total external work done on the block-earth system as the block moves 5 m Ye 37 up the incline b) Find the change in gravitational potential energy for the block-earth system as the block moves 5 m up the incline. c) Find the change in kinetic energy for the block-carth system as the block moves 5 m up the incline.When you slide a box on a horizontal surface, what happens to the gravitational potential energy of the box? Group of answer choices Increases Decreases It does not change Undefined as the reference point is not specified
- How fast must a 2.5-g ping-pong ball move in order to have the same kinetic energy as a 145 g baseball moving at 32.0 m/s? m/s Physical ConstantsTwo cars come to a stop from the same initial speed, one braking gently and the other braking hard. Which car converts more kinetic energy to thermal energy? The gently braking car The hard braking car Both cars convert the same amount of kinetic energy to thermal energyQuestion 8 Questions #8-9 start with the same description. A 1,100 kg horse is walking at 2.0 m/s. What type of energy is being described? Your answer: O chemical O elastic O gravitational O kinetic
- When a 12 kg object increases its potential energy by 720 J, approximately how has its position changed? a) It has risen vertically 60m b) It has fallen vertically 6m c) It has risen vertically 6m d) It has fallen vertically 60mA car accelerates from 10 km/hr to 40 km/hr, how much does its kinetic energy change? a) KE doubles, b) KE quadruples, c) KE increases eightfold, d) KE is cut in half, or e) you would need to know the mass of the car to determine the change in KE.A crane at a junkyard lifts a car with a mass of 1800 kg at a constant speed to a height of 16 m. It then turns and drops the car into a car crusher on the ground below. a) Determine the maximum gravitational potential energy of the car b) Determine the speed of the car when it has fallen 12 m