What is the kinetic energy of an object at rest
Asked by admin @ in Chemistry viewed by 334 People
which has more kinetic energy, a 5-kg object moving at 5 m/s 1 m off the ground or a 5-kg object at rest 2 m off the ground?
Asked by admin @ in Chemistry viewed by 334 People
which has more kinetic energy, a 5-kg object moving at 5 m/s 1 m off the ground or a 5-kg object at rest 2 m off the ground?
Answered by admin @
Answer:
Explanation:
Kinetic energy is the energy due to changes in position of a body. It is always with regards to motion of a body.
Potential energy on the other hand is the energy at rest of a body.
To estimate kinetic energy, we use the formula:
K.E =
where m is the mass of the body and v is the velocity of the object.
mass is 5kg and velocity is 5ms⁻¹
K.E =
K.E = 62.5J
for the object at rest;
potential energy is calculated:
P.E = mgh
where m is the mass, g is the acceleration due to gravity and h is the height
m is 5kg, h is 2 and g is 9.8
P.E = 5 x 9.8 x 2 = 98J
The moving object has kinetic energy with the object at rest having potential energy.
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