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a block of mass m = 3.09 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of magnitude F = 13.7 N at an angle θ = 23.0°.
(a) What is the magnitude of the block's acceleration?
(b) The force magnitude F is slowly increased. What is its value just before the block is lifted (completely) off the floor?
(c) What is the magnitude of the block's acceleration just before it is lifted (completely) off the floor?
An 19.3kg box is released on a 36.1o incline and accelerates down the incline at 0.276m/s2. What is the magnitude of the friction force impeding its motion
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A helium-neon laser beam has a wavelength in air of 633 nm. It takes 1.48 ns for the light to travel through 29 cm of an unknown liquid. Determine the wavelength of the laser beam in the liquid
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How deep does a point in the middle of the floor of a4-m-deep pool appear to a person standing 2.8 meters horizontally from the point? Take the refractive index for the pool to be 1.3 and for air to be 1. (Assume the person is standing in the pool wi..
A 120-V motor has mechanical power output of 2.50 hp. It is 90% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A 475 kg concrete beam should be raised by a 10.0 m from the ground. How much power is needed to do the job in 24 s
A car goes around a curve on a road that is banked at an angle of 31.5 degrees. What is the radius of the curve
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