How much potential energy does a 25 kg pumpkin have when it is 17 meters above the ground?
Potential energy of a body of mass m at a height h above the ground
PE=mgh
=25×9.8×17
= 4165 J
How much potential energy does a 25 kg pumpkin have when it is 17 meters above...
True or False. An object at 2.0 meters above ground has twice as much potential energy than at 0.50 meters above ground.
3. A 4kg weight is held 6m above the ground. (a) How much potential energy does the 4kg weight have at the height of 6m? answer (b) If the weight was dropped, how much kinetic energy would it have just as it hits the ground? answer (c) How fast would the weight be moving at a height of 3m? answer (d) How fast would the weight be moving as it hits the ground? answer
An 80 kg object is dropped from rest from a height of 25 meters above the ground. Use the concept of energy conservation to find its speed when it is 10 meters above the ground.
Raise a mass 45.7 kg to height 7.7 in meters, then let it go. How much kinetic energy does it have in joules when it reaches the ground? Assume the acceleration of gravity is 9.8 m/s2.
4. A mass of 2 kg is held 4 meters above the ground. The gravitational potential energy of this object, relative to the ground, is ___. 5. Which is easier, stopping a 1000 kg car traveling at 40 m / s or a 2000 kg car traveling at 20 m / s? 8. Suppose an airplane fires bullets in the same direction it travels. Does the momentum of the plane increase, decrease or remain the same? Explain
An 80 kg object is dropped from rest from a height of 25 meters above the ground. Use the concept of energy conservation to find its speed when it is 15 meters above the ground. a.28 m/s b.6.4 m/s c.14 m/s d.9.9 m/s
1 pts Question 3 How much potential energy (J) does a 2000 kg car possess relative to the floor of a garage when it is onta hydraulic lift 5 ft above the floor? 10,000 1x 10 3,000 3 X101
Sarah is holding a 20 kg dumbbell over a 30-meter high cliff (32 meters from her hands to the ground). Just as she releases the dumbbell, it has a potential energy of 6272 J and kinetic energy of 0 J. However, just as the dumbbell hits the ground, how much potential and kinetic energy does it have?
A) A mass of 2.9 kg is dropped from a height of 4.07 meters above a vertical spring anchored at its lower end to the floor. If the spring constant is 25 N/cm, how far, to the nearest tenth of a cm, is the spring compressed? B) If the top of the spring in the preceding problem is 1.99 meters above the ground when the mass is released, what is the ball's kinetic energy, to the nearest Joule, just before...
A 15kg object falls a distance of 5.0 meters. How much work does gravity do on the object during this motion? Use the work-energy principle (from chapter 6- NO POTENTIAL ENERGY) to determine the speed of the object just as it reaches the ground. Assume there is no air resistance and the object starts from rest.