Rotational Kinetic Energy: A solid uniform 3.33-kg disk has thin string of negligible mass wrapped around its rim, with one end of the string tied to the ceiling, as shown in the figure. The disk is released from rest, and as it falls, it turns as the string unwraps. At the instant its center has fallen 2.25 m, (a) how fast is the center moving, and (b) how much rotational kinetic energy does the disk have?
What will be an ideal response?
(a) 5.42 m/s (b) 24.5 J
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The _______________ model explains pulsars using beams of radiation that sweep around the sky
Fill in the blank(s) with correct word
The units of momentum are
A. ML/T.
B. M/T.
C. 
D. 
E. 
Which of the following represents a case in which you are not accelerating?
A) driving in a straight line at 100 kilometers per hour B) going from 0 to 100 kilometers per hour in 10 seconds C) slamming on the brakes to come to a stop at a stop sign D) driving 100 kilometers per hour around a curve
As a spaceship is moving toward Earth, an Earthling measures its length to be 325 m,
while the captain on board radios that her spaceship's length is 1150 m. (c = 3.00 × 108 m/s) (a) How fast is the rocket moving relative to Earth? (b) What is the TOTAL energy of a 75.0-kg crewman as measured by (i) the captain in the rocket and (ii) the Earthling?