Answer:
-v/2
Explanation:
Given that:
- Collides with the wall going through a sliding motion on on the plane smooth surface.
- Upon rebounding from the wall its kinetic energy becomes one-fourth of the initial kinetic energy before collision.
<u>We know, kinetic energy is given as:</u>
consider this to be the initial kinetic energy of the body.
<u>Now after collision:</u>
Considering that the mass of the body remains constant before and after collision.
Therefore the velocity of the body after collision will become half of the initial velocity but its direction is also reversed which can be denoted by a negative sign.
Answer:
m = 1.64 kg
Explanation:
Given that,
The work done to lift a body, W = 1,033 J
Height, h = 64 m
We need to find its mass. The work done in lifting the mass is given by :
Hence, the mass of the body is 1.64 kg.
How the physical world operates.