If an object weighing 12 N is released from rest at a height of 3 m above the ground.  a. How much potential energy has the object lost when it is at a height of 1 m from the ground? b. What is the amount of kinetic energy the object has gained at this point? c. What is the velocity of the object at this position?

6. At the moment when a bodybuilder throws a 10.0kg medicine ball, it is exactly 2.0m above the ground and traveling at 5.0 m/s. It reaches a maximum height of 3.0m above the ground and then falls to the ground. Assume that air resistance is negligible. a. What is the potential energy of the ball as it leaves the hands relative to the ground? b. What is the kinetic energy of the ball as it leaves the hands? c. What is the total mechanical energy (kinetic plus potential) of the ball as it left the hands? 1.200 d. What is the total mechanical energy of the shot JUST as it reaches its maximum height? e. What is the potential energy of the shot just as it reaches its maximum height? f. What is the kinetic energy of the shot just as it reaches its maximum height?

2. Consider the concepts of kinetic energy (KE) and gravitational potential energy (GPE) as you complete these questions. A ball is held 1.4 meters above the floor. Use the terms KE of GPE as your answers. A. When the ball is held motionless above the floor, the ball possesses only B. If the ball is dropped, its energy decreases as it falls. C. If the ball is dropped, its energy increases as it falls. D. In fact, in the absence of air resistance, the amount of impact with the floor. energy. energy when the ball is held motionless above the floor equals the amount of energy at

At its maximum speed, a 4 kg sloth can climb a height of 6 m in 2 minutes. A. What is the primary energy transformation that is taking place? B. What is the force required for the sloth to climb at a constant speed? C. How much work does this sloth do climbing the tree? D. How much does the potential energy increase?

2. An object has 560 J of potential energy and 890 J of mechanical energy. How much kinetic energy does the object have?. ME = REHPE 560 560 330J= PE olog ertev 3. A slingshot rubber band with a spring constant of 850 N/m was stretched 0.33 m. A 0.4 kg rock was fired from the slingshot after it was released. a. Find the spring potential energy. PE =)2 kx? Z(850X.33) b. What is the kinetic energy of the stone once it was released? PEERE c. What is the velocity of the stone as soon as the slingshot was released?

A camera weighing 15 N falls from a small drone hovering 35 m overhead and enters free fall. What is the gravitational potential energy change of the camera from the drone to the ground if you take a reference point of a. the ground being zero gravitational potential energy? APE b. The drone being zero gravitational potential energy? APE What is the gravitational potential energy of the camera (with the reference point of zero gravitational potential energy taken to be a second person looking out of a building 30 m from the ground) c. before it falls from the drone? PE=| d. after the camera lands on the ground? PE Submit Question

You throw a ball into the air. You let the ball go at a height of 1.5 m, and the ball is moving at a speed of 8 m/s when you let it go. The ball weighs 0.5 kg. a. What is the total energy of the ball when you let it go? b. Later, the ball is moving through the air at a speed of 4 m/s. How high is it off the ground? Assume energy is conserved. TT T Paragranh Arial 3 (12pt)

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?

1. An apple hanging from a limb has potential energy because of its height. If it falls, what becomes of this energy just before it hits the ground? a. its total energy goes to zero b. its P.E. is transformed into kinetic energy c. its energy is transformed into the thermal energy of the apple and the ground d. its P.E. increases and just before it hits the ground it is doubled   2. An energy bar contains 105 kilocalories. How much work is the equivalent of this energy bar? a. 25.06 KJoules b. 439.95 kJoules c. 10.5 kJoules d. 0.14 Joules   letter only