An 1kg object is dropped from a height of 50 meters. What is its gravitational potential energy just before hitting the ground? (Take g = 9.8 m/s²)*1 pointa) 490 Jb) 245 Jc) 4900 Jd) 2450 J
Question
An 1kg object is dropped from a height of 50 meters. What is its gravitational potential energy just before hitting the ground? (Take g = 9.8 m/s²)*1 pointa) 490 Jb) 245 Jc) 4900 Jd) 2450 J
Solution
The gravitational potential energy (PE) of an object can be calculated using the formula:
PE = mgh
where: m = mass of the object (in kg) g = acceleration due to gravity (in m/s²) h = height above the ground (in m)
In this case, the mass (m) of the object is 1 kg, the acceleration due to gravity (g) is 9.8 m/s², and the height (h) from which the object is dropped is 50 m.
Substituting these values into the formula gives:
PE = 1 kg * 9.8 m/s² * 50 m = 490 J
So, the gravitational potential energy of the object just before it hits the ground is 490 J. Therefore, the correct answer is a) 490 J.
Similar Questions
An object starts at rest from a height of 50 meters. It's total energy is 500 J. The object begins a free-falling motion; there is no air resistance. When it has fallen to a height of 10 meters, it's gravitational potential energy will be
An object of mass 12 kg is at a certain height above the ground. If the gravitational potential energy of the object is 480 J, find the height at which the object is with respect to the ground. (g = 10 ms–2)
GPE = mgh. A rock with a mass of 5 kg is lifted to the top of a cliff that is 30 meters high. What is the gravitational potential energy of the rock at the top of the cliff?*1 pointa) 1500 Jb) 3000 Jc) 4500 Jd) 6000 J
A stone of mass 500 grams is dropped from a height of 6 metres and hits the ground. Find the potential energy it loses.55 J67 J33 J30 J
A ball of mass 200g falls from a height of 5 m. What will be its kinetic energy when it just reaches theground? (g=9.8 m/s2
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.