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A fisherman's scale stretches 4.2 cm when a 2.6 kg fish hangs from it.
(a) What is the spring stiffness constant?
N/m
(b) What will be the amplitude and frequency of vibration if the fish is pulled down 3.0 cm more and released so that it vibrates up and down?
amplitude cm
frequency Hz
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A charge of +2q is fixed to one corner of a square, while a charge of -1q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of square, so the potential is zero at each of the two empty c..
1.two paths lead to the top of a big hill. one is steep and direct while the other is twice as long but less steep.
A massless string is wrapped around a solid disk of mass m_1 and tied to a block of mass m_2. The disk is free to rotate on a frictionless horizontal axle.
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You throw a ball with mass 0.40 kg against a brick wall. It hits the wall moving horizontally to the left at 30. m/s, find the average horizontal force the wall exerts on the ball during the impact
Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. How far away is the planet Venus if the echo time is 1500 s
A football is kicked with a speed of 20m/s at an angle of 40 degrees to the horizontal, how long is the football in the air
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