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1. A man applies a force of F = 3.00 102 N at an angle of 60.0° to a door, x = 2.20 m from the hinges. Find the torque on the door, choosing the position of the hinges as the axis of rotation.
2. Suppose a wedge is placed 1.50 m from the hinges on the other side of the door. What minimum force must the wedge exert so that the force applied in part (a) won't open the door?
3. A man ties one end of a strong rope 7.64 m long to the bumper of his truck, 0.596 m from the ground, and the other end to a vertical tree trunk at a height of 3.65 m. He uses the truck to create a tension of8.05 102 N in the rope. Compute the magnitude of the torque on the tree due to the tension in the rope, with the base of the tree acting as the reference point.
What is the total translational kinetic energy in a test chamber filled with nitrogen (N2) at 2.03×105 Pa and 20.7°C? The dimensions of the chamber are 3.00 m × 6.00 m × 8.30 m
Two point charges lie on the x axis. A charge of +9.5 µC is at the origin, and a charge of -9.5 µC is at x = 10.0 cm, What is the net electric field at x = -4.0 cm
An incandescent lightbulb draws 0.50 A, while a compact fluorescent with the same light output draws 125 mA. How do their energy-consumption rates compare
A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, What is the initial kinetic energy of the car
A 1.81 kg block and a 3.62 kg block are initially at rest on a frictionless, horizontal surface, How much does the kinetic energy of the system increase
bowler uses a 5-kg bowling ball. What is the weight of the bowling ball, What is the momentum of the ball
The distance between the objective and eyepiece lenses in a microscope is 25\; cm. What is the total linear magnification for the microscope
At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom scale. Find the maximum downward acceleration experienced by the crewman
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. a) how much of this charge is on the inner surface of the car? b) how much is on the outer surface of the car?
The current-density magnitude in a certain circular wire is J = (3.10 × 1010 A/m4)r2, How much energy is converted to thermal energy in 2.00 h
A potter's wheel is rotating at 3.2 rad/s in a counterclockwise direction when the potter turns it off and lets it slow to a stop. This takes 26 seconds. What is the average angular acceleration of the wheel during this time?
The ratio of the average acceleration values is a1/a2 = 1.24. Find out the velocity of the car at the end of the initial ten-second interval.
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