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A large cruise ship of mass 6.70 107 kg has a speed of 13.0 m/s at some instant.
(a) What is the ship's kinetic energy at this time?
J
(b) How much work is required to stop it? (Include the sign of this value.)
(c) What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.30 km?
N
A uniform thin rod of mass 4.19 kg pivots about an axis through its center and perpendicular to its length. What must the length of the rod be so that the moment of inertia of the three-body system with respect to the described axis is 0.977 kg·m2
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It is said that Galileo discovered a basic principle of the pendulum - that period is independent of the amplitude - by using his pulse to time the period of swinging lamps in the cathedral as they swayed in the breeze. assume that one oscillation..
Richard is driving home to visit his parents. 135{\rm mi} of the trip are on the interstate highway where the speed limit is 65{\rm mph}. How many minutes does he save
Once free of this area, it speeds up to 13 m/s in 8 {rm s}. At the edge of town, driver again accelerates, with the same acceleration, for another 16 {rm s} to reach a higher cruising speed.
A magnifying glass uses a converging lens with a focal length of 15.5 cm. It produces a virtual and upright image that is 3.3 times larger than the object. How far is the object from the lens
How much work is done by the motor when the motor when the position of the arm is moved from x=0.150m to x=0.750m? what is the power of the motor in watts
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