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3. A spring, with a spring constant of 5710 N/m, is compressed by 0.45 m and used to launch a 15.5 kg mass from rest from point A across a frictionless surface and down a short hill that is H = 1.73 m high. The surface becomes rough at point B, and the mass comes to a stop at point C.
(a) How much work was done by friction between B and C?
(b) If the coefficient of kinetic friction between the mass and the rough surface is 0.53, how far will it travel before coming to rest? That is, determine the distance between point B and point C.
Neutron stars, such as the one at the center of the Crab Nebula, what would you weigh on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0 km
Object O1 is 14.7 cm to the left of a converging lens with a 10.8-cm focal length. What is the overall magnification of this system
The angle of incidence at a solid/liquid boundary is59.9°, and the index of refraction of the solid is n =1.52. (a) What must be the index of refraction ofthe liquid such that the direction of the light entering the liquidis not changed?
Race tracks are "banked" so that cars may travel faster around curves. Consider the situation described in problem 5), but bank the track at 15°. What is the maximum speed the car can have without the tires slipping
What is the physical meaning of the y-intercept?
The electric motor of a model train accelerates the train from rest to 0.740 meter per second in 30 milliseconds. Obtain the average power delivered to the train during its acceleration
Burglars are trying to push a 1000 kg safe up a 20o frictionless ramp with a horizontal force of 4000N. What is Burglars are trying to push a 1000 kg safe up a 20o frictionless ramp with a horizontal force of 4000N. What is the safe's acceleration up..
Calculate the magnitude of the force
One object is at rest, and another is moving. The two collide ina one-dimensional, completely inelastic collision. In other words,they stick together after the collision and move off with a commonvelocity. Momentum is conserved.
Why does air circulate from a point with less pressure towards one with more pressure? (We have a tunnel, and on one side the wind blows faster than at the other)
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to 14 before coming to rest momentarily? answer in m/s.
A 55.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. find the force exerted by the horizontal rope on her arms
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