The figure shown a cylinder of radius 0? Its axis. The speed of the point P is:

Question

The figure shown a cylinder of radius 0? Its axis. The speed of the point P is: A) 7.0 m/s B) 14 rad/s C) rad/s D) 0.70 m/s E) none of these A particle moves is a circular path of radius 0.10 m with a constant angular speed of 5. The acceleration of the particle: A) 0.10 m/s^2 B) 0.50 m/s^2 C) 500 m/s^2 D) 2.5 m/s^2 E) 10x^2 m/s^2 A flywood of a diameter 1.2 m has a constant angular acceleration of 5.0 rad/s?. The acceleration of a point on its A) 3.0 rad/s^2 B) 3.0 m/s^2 C) 5.0 m/s^2 D) 6.0 m/s^2 E) 12 m/s^2 Three identical balls are tied by light strings to the same rod and rotate around it, as shown below. Rank the balls according to their rotational inertia, least to greatest. A) 1, 2, 3 B) 3, 2, 1 C) 3, then 1 and 2 tie D) 1, 3, 2 E) All are the same A pulley with a radius of 3.0 cm and a rotational inertia of 45 times10^-3 kg m^2 is suspended from the ceiling, A rope passes over it with a 2.0-kg block attached to one end and a 4.0-kg block attached to the other. The rope does not on the pulley. When the velocity of the heavier block is 2.0 m/s the total kinetic energy of the pulley and blocks is: A) 2.0 J B) 12 J C) 14 J D) 22 J E) 28 J

Explanation / Answer

1.

the speed at point P is

V=RW=0.7*10

V=7 m/s

2.answer is E

1 rev=2pi radians

acceleration of the particle

a=W2R=(5*2pi)2*0.1=100*0.1*pi2

a=10pi2 m/s2

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