Rotational Kinetic Energy: A solid uniform sphere of mass 120 kg and radius 1.7 m starts from rest and rolls without slipping down an inclined plane of vertical height 5.3 m. What is the angular speed of the sphere at the bottom of the inclined plane?
A. 5.1 rad/s
B. 8.7 rad/s
C. 9.7 rad/s
D. 6.1 rad/s
Answer: A
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In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y) = 2xy - x2 - y, where x and y are measured in meters and V is in volts. At which point is the electric field equal to zero?
A) x = 0.5 m, y = 1 m B) x = 1 m, y = 1 m C) x = 1 m, y = 0.5 m D) x = 0.5 m, y = 0.5 m E) x = 0 m, y = 0 m
The weight of an object equals its mass times the acceleration of gravity
a. True b. False Indicate whether the statement is true or false
As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
a. greater than the tension would be if the box were stationary. b. greater than the weight of the box. c. equal to the weight of the box. d. less than the weight of the box.
Proportional Reasoning: Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John stays in the air
A. 0.50 times as long as Harry. B. the same time as Harry. C. twice as long as Harry. D. three times as long as Harry. E. four times as long as Harry.