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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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
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
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