A sphere of radius R and mass M is released from rest, and rolls without slipping down a plane inclined at angle G above horizontal. What is the speed of the sphere after it has moved a distance L?

What will be an ideal response?


(5/6 ) g L sin G

Physics & Space Science

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Atmospheric pressure is caused by the

A) density of the atmosphere. B) weight of the atmosphere. C) temperature of the atmosphere. D) solar energy on the atmosphere.

Physics & Space Science

An object is dropped from rest on the planet Jupiter. At the end of 1 second, it has fallen 8 m and is moving at 16 m/s. What was its average speed during the entire first second [i.e., from t=0 until t=1 sec]?

A) 4 m/s B) 16 m/s C) 8 m/s D) 12 m/s E) None of the above.

Physics & Space Science

An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that

A) egg-shell calcium is repelled by sodium chloride. B) the density of salt water exceeds the density of the egg. C) buoyant force is not always exerted upward. D) salt sinks to the bottom. E) none of the above

Physics & Space Science

As a copper wire is heated, its length increases by 0.200%. What is the change of the temperature of the wire? (aCu = 16.6 × 10^-6/C°)

a. 120°C c. 30.1°C b. 60.2°C d. 6.0°C

Physics & Space Science