Consider a situation where you carry a 20 N box up a flight of stairs, raising its elevation by 5 m. You drop the box. As it falls to its original level, its kinetic energy is __________
Fill in the blank(s) with correct word
100 J
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A hoop of radius 0.50 m and a mass of 0.20 kg is released from rest and allowed to roll down an inclined plane. How fast is it moving after dropping a vertical distance of 3.0 m?
A) 7.7 m/s B) 6.2 m/s C) 5.4 m/s D) 3.8 m/s E) 2.2 m/s
Proportional Reasoning: Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if braking from 56 mi/h than from 28 mi/h?
A. 8 times as long B. 4 times as long C. 2 times as long D. 1.4 times as long E. the same in both cases
The greatest cause of hurricane deaths is
a. the storm surge. b. panic. c. the eye. d. high winds.
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2.0 rad/s. Two seconds later it has turned through 5.0 complete revolutions. What is the angular acceleration of this wheel?
a. 17 rad/s2 b. 14 rad/s2 c. 20 rad/s2 d. 23 rad/s2 e. 13 rad/s2