A solid uniform sphere is rolling without slipping along a horizontal surface with a speed of 5.5 m/s
when it starts up a ramp that makes an angle of 25° with the horizontal. What is the speed of the sphere after it has rolled 3.0 m up as measured along the surface of the ramp?
A) 4.0 m/s
B) 8.0 m/s
C) 1.9 m/s
D) 2.2 m/s
E) 3.5 m/s
E
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If energy is released when the parts of a system are allowed to disperse to infinity, its binding energy is
A. Positive. B. Negative. C. Zero. D. Not defined in such a case.
State Bernoulli's principle
You do not see your image when you look at a flat rough aluminum surface because of __________
Fill in the blank(s) with correct word
An astronaut in a rocket moving with a speed v = 0.6c relative to Earth performs a collision experiment with two small steel balls and concludes the both momentum and energy are conserved. What would an Earth observer conclude?
A. only momentum is conserved B. only energy is conserved C. neither energy or momentum is conserved D. both energy and momentum are conserved