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When a block slides across a floor, what is the direction of the frictional force acting on the block from the floor?
1- in the direction of the sliding
2- opposite the direction of the sliding
A 2,493-kg car is moving down a road with a slope (grade) of 14% at a constant speed of 13 m/s. What is the direction and magnitude of the frictional force?
a 0.5kg block at rest on a table is attached to a horizontal spring with a spring constant k200 nm. the spring is
A spring (75N/m ) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 m, If the mass is attached to the spring, how far up the slope from the compressed point will the mass move before coming to rest
A 120 V potential is applied to a space heater that dissipates500 W during its operation. What is the resistance of the heater
A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure. Calculate the change in internal energy of the gas
A 75kg skier at the Olympics starting from rest slid down a 50mramp inclined at 60 degrees and achieved a speed of 26m/s at thebottom. How much kinetic energy was gained
q1. a 22 kg girl slides down a playground slide that is 8.50 m high. when she reaches the bottom of the slide her speed
A possible means for making an airplane invisible to radar is to coat the plane by an antireflective polymer. If radar waves have a wavelength of 3.10 cm and the index of refraction of the polymer is n = 1.70, how thick would you make the coating? (S..
A 1.2 kilogram object moving with a speed of 8m/s collides perpendicularly with wall and emerges with a speed of 6m/s in the opposite direction, find the magnitude of the average force on the object by the wall
a lawnmower engine with an efficiency of 0.25 rejects 9825j of heat every second. what is the magnitude of the work
a uniform 5.93 m long horizontal beam that weighs 468N is attachedto a wall by a pin connection that allows the beam to rotate. itsfar end is supported by a cable that makes an angle of 51 degreeswith the horizontal, and a 582N person is standing 1.2..
A blow-dryer and a vacuum cleaner each operate with a voltage of120 V. The current rating of the blow-dryer is 12 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by theblow-dryer.
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