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During a football game, a receiver has just caught a pass and is standing still. Before he can move, a tackler, running at a velocity of +4.1 m/s, grabs and holds onto him so that they move off together with a velocity of +2.4 m/s. If the mass of the tackler is 125 kg, determine the mass of the receiver. Assume momentum is conserved.
A very narrow hole is drilled all the way through the Earth (through its center) and evacuated (i.e. there is neither air resistance nor friction). A small object of mass m is dropped into the hole at the surface.
A 58 ice cube can slide without friction up and down a 28 slope. The ice cube is pressed against a spring at the bottom of the slope, When the ice cube is released
A pilot having mass M(kg) flies a plane in a vertical loop with a radius of 800m at a constant speed of 500 km/h. Determine the force exerted on the pilot by the seat at both the top and bottom of the loop
A block is pushed up a frictionless 30° incline by an applied force as shown. If F = 25 N and M = 3.0 kg, what is the magnitude of the resulting acceleration of the block
A toy rocket engine lifts a mass of 4.5 kg to a height of 15.0 meters. At this height, the rocket is moving at 26.7 m/s. How much work was done by the rocket engine
a 2.28 kg mass connected to a spring completes one oscillation every three seconds. the motion has an amplitude of 1.5
Betty weighs 408 Newton. She is sitting on a playground swing seat that hangs 0.41 meter above the ground in its rest position. Find the magnitude of the work done by friction during this time
Two coplanar and concentric circular loops of wire carry currents of I1 = 6.20 A and I2 = 2.50 A in opposite directions as in the figure below. (a) If r1 = 12.0 cm and r2 = 8.60 cm, what is the magnitude of the net magnetic field at the center of ..
In a test laboratory, an electric engine is used to accelerate a wheel from rest. what is the average power output of the engine
Write an equation for the magnetic flux through a coil as a function of the strength of the magnetic field and the angle between the area vector and the magnetic field direction? For what angle is this expression a max? Min? Zero?
an underwater scuba diver sees the sun at an apparent angle of 47.0deg from the vertical. what is actual direction of
The left end of a long glass rod, 6.00 cm in diameter, has a convex hemispherical surface 3.00 cm in radius. The refractive index of the glass is 1.60. Decide the position s_b of the image of an object placed in air on the axis of the rod infinitely ..
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