The moment of inertia for rolling motion is
I = Mr²
The linear velocity is v = 2 m/s. The rotational velocity is
ω = 2/r
The total KE (kinetic energy) is
KE = (1/2)Mv² + (1/2) I ω²
= (1/2)(M)(4) + (1/2)(Mr²)(4/r²)
= 2M + 2M
= 4M
Answer: 4M
Answer:B
Explanation: Gravity pulls denser air and water downward, forcing less dense air and water to move upward. The warm water near the surface of the ocean heats up with sunlight and evaporates, keeping the water cycle in motion.
c. To increase power, you can increase the amount of work you do in a given amount of time, or you can do a given amount of work in less time.
Explanation:
- Power in physics is defined as the rate of energy is being transferred over a particular time. The rate or amount of energy transfer is the work done to an object whereas it is in a specified time.
- The formula to find the power is , Hence, to increase the power in a given system either you have to reduce the time by increasing the work or increase the amount of work in the given time.