Which is the correct expression for the force of static friction, where n is the normal force?
a. fs < ?sn
b. fs ? ?sn
c. fs > ?sn
d. fs ? ?sn
b
You might also like to view...
When a light ray in air enters water at 15° from the normal, it
A) always bends toward the normal. B) always bends away from the normal. C) sometimes bends towards or away from the normal. D) does not bend.
Determine the magnitude and sense (direction) of the current in the 10-? resistor when I = 1.8 A.
A. 1.6 A right to left B. 1.6 A left to right C. 1.2 A right to left D. 1.2 A left to right E. 1.8 A left to right
Assuming negligible friction, what spring constant would be needed by the spring in a "B-B gun" to fire a 10-g pellet to a height of 100 m if the spring is initially compressed by 0.10 m?
A) 20 N/cm B) 20 N/m C) 200 N/m D) 2000 N/cm E) 0.0020 N/m
A ball is thrown straight upward with an initial speed of 30 m/s. Assuming there is no air resistance, how high does the ball go before falling back down?