A box is sliding down an incline tilted at a 12.0° angle above horizontal. The box is initially sliding down the incline at a speed of 1.50 m/s. The coefficient of kinetic friction between the box and the incline is 0.340
How far does the box slide down the incline before coming to rest? A) 0.920 m
B) 2.33 m
C) 1.78 m
D) 0.720 m
E) The box does not stop. It accelerates down the plane.
A
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Force on a Wire: A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.65 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section BC of this wire?
A. 0 N B. 0.090 N perpendicular out of the page C. 0.090 N perpendicular into the page D. 0.060 N perpendicular out of the page E. None of these
A light beam having a wavelength of 470. nm in air is directed into glycerine (n = 1.47)
(a) What is the frequency of the light in the glycerine? (b) What is its wavelength in the glycerine? (c) If the incident angle is 75.0°, what is the refracted angle?
A machinist turns on the power on to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of The wheel is run at that angular velocity for 30 s, and then power is shut off
The wheel slows down uniformly at until the wheel stops. What is the total number of revolutions made by the wheel in this situation? A) 510 B) 280 C) 320 D) 470 E) 750
As more resistors are added in parallel across a constant voltage source, the power supplied by the source
A) increases. B) decreases. C) does not change.