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A 782 kg car is pushed at a constant positive velocity in a flat parking lot whose coefficient of friction is 0.18. If the car is pushed for 23 meters,
then what work is done by the forces acting on the object?
What net work is done on the car?
The work done by friction is ?
The work done by the pushing force is ? (Hint: be careful with sign convention)
The work done by gravity is ?
The work done by the normal force is ?
The net work done is ?
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, How far away from the subject was the reporter standing
A skateboarder, with an initial speed of 5.0 m/s, rolls virtually friction free down a straight incline of length 19 m in 3.3 s. What is the angle of the incline
q1. in an 8.00 km race one runner runs at a steady 11.0 kmh and another runs at 14.3 .kmhr.how far from the finish line
The string will break if its tension exceeds 50-{rm N}. The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find out the maximum speed the stone can attain without breaking the string.
A block is being pulled by a rope with a force of 24 N. The rope has an angle of theta=20 degrees from the horizontal. The block moves a distance of 11 m. Elucidate what is the work done?
A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 242 N. What is the magnitude of the acceleration of rock.
A flashlight on the bottom of a 3.70 m deep swimming pool sends a ray upward at an angle, What angle (in air) does the emerging ray make with the water's surface
Two scales on a voltmeter measure voltages up to 20.0 V and 28.0 V, respectively. Determine the coil resistance
Two 100 N forces pull on a 50kg mass. One of the forces pulls to the right and the other pulls 90 degrees from the first force. What is the net acceleration of the mass
A crate rests on the flatbed of a truck that is initially traveling at 15 m/s on a level road. what is the minimum coefficient of friction between the crate and the truck that is required to keep the crate from sliding
End A of the bar AB rests on a frictionless horizontal surface, and end B is hinged. A horizontal force vec F of magnitude 107 {rm N} is exerted on end A. You can ignore the weight of the bar. What is the vertical component of the force exerted by..
An experimenter arranges to trigger two flashbulbs simultaneously, producing a big flash located at the origin of his reference frame and a small flash at x = 8.25 km. What time interval between them does she find
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