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1.You are holding a 6-kg dumbbell straight out at arm's length. Assuming your arm is 0.70 m long, what torque is the dumbbell exerting on your shoulder?
2. A beam is balanced on a stand. If you place a 50-kg mass on one side at a distance of 2.0 m from the center, how far from the center would you place a 25-kg mass on the other side so that the system balances?
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
Two protons, moving in a plane perpendicular to a uniform 510 G magnetic field, How much time elapses before they collide again
Pool players often pride themselves on their ability to impart a large speed on a pool ball. At what speed did his pool ball hit the ground
A 31g ball rolls around a 46cm -diameter L-shaped track, shown in the figure, at 56rpm. Rolling friction can be neglected. find the magnitude of the net force of the track on the ball
q1. a persons heart and head are 1.2m and 1.7m above the feet respectively. find out the potential energy associated
Problem on elevator
You are so tired after studying that you leave all of these household devices turned on for 13.0 hours, Calculate the cost (in dollars) of the electric bill
A 300 kg elevator is being pulled upwards by a steel cable at a constant velocity. What is the net force on the elevator
A disk of mass M and radius R is initially at rest. It is acted upon by a constant torque N for a time t. what was the minumum power rating of the motor
A 50-g block of copper at -15?C is added to 100g of water in a 71-g aluminum cup. The cup and the water have an initial temperature of 4.0?C. Find the equilibrium temperature of the cup
What is the highest speed with which an 1180-kg car can round a turn of radius 75.00 m on a flat road if the coefficient of static friction between tires and road is 0.80.
A 0.080 T magnetic field is perpendicular to a circular loop of wire with 100 turns and radius 30cm. what is the magnitude of the induced emf
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