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A person pushes horizontally with a force of 210 N on a 53 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.30.
(a) What is the magnitude of the frictional force?
(b) What is the magnitude of the crate's acceleration?
A certain current on passing through a galvanometer produces a deflection of 100 divisions. The galvanometer resistance would be
a stone falls from rest from the top of a cliff. a second stone is thrown downward from the same height 3.4 s later
A high diver of mass 50.0 kg jumps off a board 10.0 m above the water. what average force did the water exert on her
q1. assume acceleration is constant during each time interval but not necessarily the same in both intervals what
A tennis player swings her 1000 g racket with a speed of 8.00m/s . She hits a 60 g tennis ball that was approaching her at a speed of 13.0m/s, How fast is her racket moving immediately after the impact
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 134 km long, 39.4 km wide, and 187 m thick.
A mode-locked, titanium-sapphire laser has a wavelength of 850 nm and produces 100 million pulses of light each second. What is the average power produced by the laser
Block 1, with mass m1 and speed 5.0 m/s, slides along an x axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, How far into that region do the two blocks slide
A ball is thrown against a smooth wall. The bass has mass 6.0g and strikes the wall in the perpendicular direction with a speed of 12 m/s. what is magnitude of the impulse delivered by the wall
A flywheel rotates at 50 rad/s. It is brought to rest by a constant frictional torque after making 10 complete revolutions. How long did it take to stop the flywheel
A vacuum cleaner is plugged into a 120.0-V socket and uses 4.1 A of current in normal operation, Find the coil resistance of the motor
question1assume two boxes on a frictionless table are linked by a heavy cord of mass 1.0 kg. compute acceleration
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