Rotational Kinetic Energy: A uniform ball is released from rest on a no-slip surface, as shown in the figure. After reaching its lowest point, the ball begins to rise again, this time on a frictionless surface. When the ball reaches its maximum height on the frictionless surface, it is
A. higher than when it was released.
B. lower than when it was released.
C. at the same height from which it was released.
D. It is impossible to tell without knowing the mass of the ball.
E. It is impossible to tell without knowing the radius of the ball.
Answer: B
You might also like to view...
Compare two vibrating strings, each has the same tension, but the second has four times the mass density of the first. The wave speed along the 2nd string is how many times the speed along the 1st?
A) 1/4 B) 1/2 C) 4 D) 2 E)
According to quantum field theory, the universe if made of
A) photons. B) quantized fields. C) electromagnetic fields. D) baseball fields. E) particles moving in empty space.
If the dark energy is described by the cosmological constant, then the _____ Universe is ____
a. open; accelerating and will not expand forever b. flat; decelerating and will expand forever c. closed; accelerating and will expand forever d. open;, decelerating and will expand forever e. flat; accelerating and will expand forever
If our eyes were sensitive only to X rays, the world would appear __________.
A. gray, black, and white like a medical X ray B. brighter than normal because X rays carry more energy than visible light photons C. dark because X-ray light does not reach Earth’s surface D. green, yellow, and orange, because those are the colors of X rays