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A 1.2-kilogram mass is projected from groundlevel with a velocity of 30 m/s at some unknown angle above thehorizontal. A short time later, after being projected, the massbarely clears a 16-meter tall fence. Disregard air resistance andassume the ground is level. What is the kinetic energy of the massas it clears the fence? 0.35kJ 0.73kJ 0.40kJ 0.68kJ 0.19kJ
Calculate the moment of inertia of a skater given the following information. THe 65 kg skater is approximated as a cylinder that has a .110 m radius
In a game of football outdoors on a cold day, a player will begin to feel exhausted after using approximately 8.0 × 105 J of internal energy. What is the magnitude of the heat that he has lost
Four resistors 10 ohms , 16 ohms , 22 ohms , and 38 ohms are in parallel. Find the current in each resistor when the parallel combination is across a 6.0 V battery
Given two masses, m1 = 18 kg and m2 =12 kg, m1 is moving with avelocity v1 colliding with m2, which is suspended by a string of length 7 m. The two masses are stuck together as the result of thecollision. The compound system swings to the right, p..
An 800 kg car moving at 6 m/s begins to coast down a hill 40m high with its engine off. How much energy was lost to friction
An electron gun in an old television picture tube is a device that uses an electric field to accelerate electrons. What magnitude of electric field is needed to accelerate an electron from rest to a speed of 4.0x10^7 m/s in a distance of .01m.
A space station, in the form of a wheel 131 m in diameter, rotates to provide an "artificial gravity" of 3.50 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute
Two forces push simultaneously a stationary 2kg box in opposite directions: F1 acts from left to right and does 150J of work on the box while F2 acts from right to left
at the local swimming hole a favorite trick is to run horizontally off a cliff that is 8.3 m above the water. one diver
Two parallel 1 m by 1 m copper plates are separated by a 1 mm gap. Both plates are at a potential of + 100 V. What is the electric field between the plates
A 70 ohm lamp and a 75 ohm lamp are connected in series and placed across a potential of 41 V. What is the equivalent resistance of the circuit
An asteroid in an elliptical orbit about the sun travels at 1.3 106 m/s at perihelion (the point of closest approach) at a distance of 2.2 108 km from the sun
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