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A boy of mass 52.5 kg is initially on askateboard of mass 2.00 kg, moving at a speed of 10.1 m/s. The boy falls off the skateboard, and hiscenter of mass moves forward at a speed of 11.1 m/s. Find the final velocity of the skate board.
Energy is released during a nuclear reaction due to aconversion between mass and energy. how much energy is released
A day on a distant planet observed orbiting a nearby star is 31.7 hours. Also, a year on the planet lasts 79.5 Earth days.* Calculate the average angular speed of the planet
A mass m is gently placed on the end of a freely hanging spring. The mass then falls 32.0 cm before it stops and begins to rise. What is the frequency of the oscillation
A jet of water squirts out horizontally from a hole near the bottom of the tank. If the hole has a diameter of 3.40 mm, what is the height, h, of the water level in the tank.
A bowling ball of mass 7.00kg is rolling at 3.00m/s along a level surface. Calculate the ball's rotational kinetic energy
Two people carry a heavy electric motor by placing it on a light board 2.30m long. One person lifts at one end with a force of 420N , find Where is its center of gravity located
A steel wire with mass21.8g and length1.6m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Calculate the tension required to obtain the proper frequency
A diverging lens (f = â€"12.0 cm) is located 23.0 cm to the left of a converging lens (f = 35.0 cm). Determine the distance of the final image relative to the converging lens
A river 101.8 m wide flows toward the south at 31.0 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. What is her velocity relative to land
Car headlights use concave mirrors. There's a concave mirror in the back of the headlight socket, and the actual light bulb is placed somewhere along the principal axis.
A tennis ball is struck and departs from the racket horizontally with a speed of 28.2 m/s. How far above the court is the tennis ball when it leaves the racket
q1. a spool of thin wire with inner radius r 0.50 m outer radius r 0.56 m and moment of inertia icm 0.81 kgm2 pivots
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