In which of the following examples is kinetic energy changing into potential energy?
1 answer:
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.
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Explanation:
1) Boyle's Law: This law states that pressure is inversely related to the volume occupied by the gas at constant temperature and number of moles.
(At constant temperature and number of moles)
- When the size of the chamber is increased the volume occupied the gas will increase with which pressure exerted by the gas will decrease down.
- When we press the inflated balloon the pressure on the gas is increased with which volume of the occupied by the gas inside the balloon decreased.
2) Charles' Law: This law states that volume occupied by the gas is directly related to the temperature of the gas at constant pressure and number of moles.
(At constant pressure and number of moles)
- The size of the balloon deceases because the in winters the temperature decreases with which volume of the gas present in the balloon also decreases.
- When the flexible closed container is heated the temperature of the gas inside the container increases with which the volume occupied by the gas in the container will increase resulting in expanding of container.
3) Avogadro's Law: This law states that volume occupied by the gas is directly related to the number of moles of the gas at constant pressure and temperature.
(At constant temperature and pressure)
When we blow air into the balloon the umber of air particles increases with which the volume of the gas inside the balloon also increases resulting in increase in size of the balloon.