A 750 N box moves at a constant velocity on a floor with a coefficient of static friction = 0.800 and coefficient of kinetic friction = 0.600. What horizontal force is required to keep the box moving?
A. 600 N
B. 550 N
C. 500 N
D. 450 N
E. 750 N
D. 450 N
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A uniform 1.0-N meterstick is suspended horizontally by vertical strings attached at each end. A 2.0-N weight is suspended from the 10-cm position on the stick, another 2.0-N weight is suspended from the 50-cm position, and a 3.0-N weight is suspended from the 60-cm position. What is the tension in the string attached at the 100-cm end of the stick?
a. 1.9 N c. 3.5 N b. 3.0 N d. 4.0 N
If you stand in front of a convex mirror, at the same distance from it as its focal length,
A) you won't see your image because there is none. B) you won't see your image because it is focused at infinity. C) you will see your image and you will appear smaller than you. D) you will see your image and you will appear larger than you. E) you will see your image and it will be the same size as you except upside down.
A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?
A. 2.4 J B. 9.6 J C. 5.4 J D. 0.6 J E. 6.0 J
If the same impulse is applied to a ping-pong ball and a baseball, the change in the ping-pong ball's momentum will be ________ the baseball's.
What will be an ideal response?