Why can't a bullet with a tiny mass have the same momentum as a moving truck?
1 answer:
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Answer:
B. A rolling ball moves uphill.
Explanation:
A rolling ball moving uphill is a typical example of how kinetic energy is changing in to potential energy
Kinetic energy is the energy due to a body in motion.
Potential energy is the energy at rest in a stationary body.
Potential energy is dependent on the mass, height and acceleration due to gravity on a body;
P. E = mgh
A ball moving uphill will have its height increasing and this will cause surge in potential energy.
Kinetic energy on the other hand depends on the mass and velocity of a body;
K.E = m v²
A ball moving up slope will have the velocity reducing and the kinetic energy reducing.
Therefore, ball rolling uphill will be decreasing in kinetic energy but increasing in potential energy.