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A horizontal force does 50 J of work on a box, while the kinetic friction force, between the box and the floor, also does work on the box that has a magnitude of 12 J. What is the change in the box's kinetic energy?
A young girl with mass 35.5kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 86.0kg?m/s, How much work has been done on the girl by the force in the time interval from t= 0s to the ..
An air puck of mass 0.029 kg is tied to the string and allowed to revolve in a circle of radius 2.0m on a frictionless horizontal surface. The other end of the string passes through a hole in the center of surface, and a mass of 2.6 kg is tied to it...
Two ropes support a load of 253 kg. The two ropes are perpendicular to each other, Find the tension in the second rope
A 0.44T magnetic field is perpendicular to a circular loop of wire with 52 turns and a radius of 17cm. what is the magnitude of the induced emf
A highway curve has a radius of 128 m. At what angle should the road be banked so that a car traveling at 27.2 m/s has no tendency to skid sideways on the road
Given the angular speed omega, find out the radius R(omega) at which the mass rotates without moving toward or away from the origin. Determine the radius in terms of k, L, M, and omega.
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car
A bullet with mass 5.06 g is fired horizontally into a 2.038-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
A positron is a particle of "antimatter"; it has the same mass as an electron (9e-31 kg), but its charge is positive instead of negative. At research facilities such as Cornell Electron Positron Storage Ring at Cornell University in New York, high..
A rock is dropped off a 200m cliff. What is the velocity of the rock at a height of 30m?( we are currently studying the conservation of energy)
When nine people whose average mass is 88 kg sit down in a car, they find that the car drops 1.42 cm lower on its springs. What is the frequency of the car's vibration if its mass (empty) is 1700 kg
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