Kinetic energy of two moving objects

In summary, kinetic energy is the energy an object has due to its motion, calculated using the formula KE = 1/2 * m * v^2. The kinetic energy of an object is directly proportional to its mass and the square of its velocity. Additionally, the kinetic energy of two objects can be added together as long as they are moving in the same direction.
  • #1
malemdk
125
11
Assume a body of mass m moving with velocity V1 towards a body with a mass M and its velocity is zero
The kinetic energy of the first body with respect to the second body is 1/2mV2 in the reference frame fixed to the non moving body
The kinetic energy of the second body with respect to the first body is 1/2MV2 in the reference frame fixed to the moving body

There is difference in KE 1/2(M-m)v^2
 
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  • #2
malemdk said:
There is difference in KE 1/2(M-m)v^2
Do you think that is a meaningful quantity?
 

FAQ: Kinetic energy of two moving objects

What is kinetic energy?

Kinetic energy is the energy an object possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity.

How is kinetic energy calculated?

Kinetic energy is calculated using the formula KE = 1/2 * m * v^2, where m is the mass of the object and v is its velocity.

What is the relationship between kinetic energy and mass?

The kinetic energy of an object is directly proportional to its mass. This means that as the mass of an object increases, its kinetic energy will also increase.

How does velocity affect kinetic energy?

The kinetic energy of an object is directly proportional to the square of its velocity. This means that as the velocity of an object increases, its kinetic energy will increase at a faster rate.

Can the kinetic energy of two objects be added together?

Yes, the kinetic energy of two objects can be added together as long as they are moving in the same direction. This is because kinetic energy is a scalar quantity and can be added or subtracted without considering the direction of motion.

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