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A 70.0-kg ice hockey goalie, originally at rest, catches a 0.150-kg hockey puck slapped at him at a velocity of 35.0 m/s. Suppose the goalie and the ice puck have an elastic collision and the puck is reflected back in the direction from which it came. What would their final velocities be in this case?
A 100 kg running back carries the ball forward with a speed of 9 m/s. He is hit head on in the air at the goal line by a 130 kg defensive back running in the opposite direction at 7 m/s
A 10.4 m long steel beam is accidentally dropped by a construction crane from a height of 8.67 m. What is the induced EMF in the beam just before impact with the Earth
A cylindrical permanent magnet has a volume of 202 cm3 and a uniform magnetization of 1.0 106 A/m along its axis. Find the magnetic torque exerted on the magnet
Find the critical angle for an optical fiber whose core has n value of 1.55 and whose cladding has n value of 1.20
A person of mass 80 kg stands at the center of a rotating merry-go-round platform of radius 3.5 m and moment of inertia 920 kg cdot m^2. The platform rotates without friction with angular velocity 0.85 rad/s. The person walks radially to the edge ..
An 84.4-mH inductor and a 6.27-µF capacitor are connected in series with a generator whose frequency is 361 Hz. Determine the rms voltage across the inductor
A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. What was the work done on the coffer by the rope
A force with a magnitude of 25 N and directed at an angle of 37° above the horizontal is used to move a 10-kg crate along a horizontal surface at constant velocity
The velocity of an object falling in free fall increases with time. Does the acceleration also increase? Why or why not?
Find the force to keep object moving.
The electric field 5.90 from a very long charged wire is ( 2300 ,toward the wire).What is the charge (in nC) on a 1 cm-long segment of the wire.
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0267 m2 in contact with the ground. Find out the weight of the automobile.
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