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A river flows due south with speed of 2.0m/s. a man steers a motorboat across the river. the river is 800m wide. at what angle in the counterclockwise direction, measured from an axis aligned with the bank of the river and pointing south, should the motorboat head in order to reach a point on the opposite bank directly east from the starting point? (the boat's speed relative to the water is 4.0m/s)
a) 30 deg
b) 60 deg
c) 90 deg
d) 120 deg
e) 150 deg
Bob and Sue are on skateboards facing each other. Bob weighs twice as much as Sue. Bob pushes Sue with a force F. Determine what will likely occur
The diagram of a speaker has a mass of 50.0g and responds to a signal of 2.0 khz by moving back and forth a with an amplitude of 1.8 X10^-4 m at that frequency. what is the force acting on the speaker
The amplitude of a lightly damped oscillator decreases by 1.7% during each cycle. What percentage of the mechanical energy of the oscillator is lost
If each spring is stretched 300 mm, determine the mass m of each block. Neglect the weight of the pulleys and cords. The springs are unstretched when d = 2 m.
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You decide to hang a plant from a 1.5-m-long 2.0-kg horizontal beam that is attached by a hinge to the wall on the left. A cable attached to the right end goes 37o above the beam to a connecting point above the hinge on the wall. You hang a 12-kg p..
q1. a horizontal uniform bar of mass 2.6 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is
A laser beam with vacuum wavelength 600 nm is incident from air onto a block of glass. find the wavelength of the light in glass
a uniformly charged disk radius r and surface charge density 1.70 microcm2 lies in the xy plane with its center at the
An 8.m, 220 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can an 770 N person climb before the la..
A steel ball of mass .5 kg is fired vertically up from the edge of a building 20 m high with an initial speed of 10 m/s. find the average resistance force that sand exerts on the ball
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