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A block is hung by a string from the inside roof of a van. When thevan goes straight ahead at a speed of 20 m/s, the block hangsvertically down. But when the van maintains this same speed aroundan unbanked curve (radius = 160 m), the block swings toward theoutside of the curve. Then the string makes an angleθ with the vertical. Find θ.
A cylinder (I = MR^2/2) is rolling along the ground at 7m/s. It comes to a hill and starts going up. Assume no losses to friction, how high does it get before it stops.
Professional baseball pitchers can deliver a pitch which can reach the blazing speed of 100 mph (miles per hour). how much kinetic energy does the ball have
Early black-and-white television sets used an electron beam to draw a picture on the screen. The electrons in the beam were accelerated by a voltage of 3.0 kV, What is the speed of electrons in the beam
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 45-mm focal length camera lens. How close was Kim to the president when she took the picture
Two parallel plates are 4.0 cm apart. The bottom plate is charged positively and the top plate is charged negatively, producing a uniform electric field of 5.0 * 10 exp 4 N/C in the region between the plates.
A cue ball m1 = 0.39 kg is shot at another billiards ball m2 = 0.59 kg which is at rest. The cue ball has an initial velocity of v =9.5 m/s. What is the cue balls final velocity in m/s
An electron is accelerated from rest in a uniform electric field of intensity 420 N/C. Find the following: its velocity and kinetic energy after 3.0 nanoseconds. the distance it travels during the time interval
Light of wavelength 0.533 µm (in air) enters the water in a swimming pool. What is the wavelength of the light in water
A 5.4 ball hangs from a steel wire 1.80 in diameter and 6.00 long. What would be the speed of the wave in the steal wire
A person lies flat on the sidewalk with her ear to the ground. A limb falls and two distinct sounds are heard, one from the air and the other from the concrete. How far away did the impact occur
The most energy efficient way to send a spacecraft to the Moon is to boost its speed while it is in circular orbit about the Earth such that the new orbit is an ellipse. The boost point is the perigee of the ellipse, and the point of arrival at th..
After a golf ball is hit it takes off with an initial speed of 20.9 m/s and at an angle of 32.5° with respect to the horizontal. How far would the ball fly if the initial speed was doubled
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