Two boxes of the same mass sit on a rough floor. These boxes are made of the same kind of cardboard and are identical except that one is twice as large as the other. If it takes 200 N to start moving the smaller box, how much force does it take to start moving the larger one?
A. Still 200 N
B. 400 N
C. 800 N
D. It depends (specify)
A. Still 200 N
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The net force on any object moving at constant velocity is
A) zero. B) 10 meters per second squared. C) equal to its weight. D) about half its weight.
Which of the following aluminum alloys should you consider the primary candidate for a design where specific yield strength is the most critical design factor?
(a) 2024-T62 (b) 7075-T6 (c) 2090-T86 (d) 8090-T651
An amusement ride consists of a car moving in a vertical circle on the end of a rigid boom. The radius of the circle is 10 m. The combined weight of the car and riders is 5.0 kN. At the top of the circle the car has a speed of 5.0 m/s which is not changing at that instant. What is the force of the boom on the car at the top of the circle?
a. 3.7 kN down b. 1.3 kN down c. 6.3 kN up d. 3.7 kN up e. 5.2 kN down
What is the average kinetic energy of an oxygen molecule in a gas with a temperature of 300K?
a. 
b. 
c. 
d. 
e. 