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A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.865 m/s encounters a rough horizontal surface of length l = 0.65 m
as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.360 and he exerts a constant horizontal force of 276 N on the crate.A man pushes a crate labeled m, which moves with a velocity vector v to the right, on a horizontal surface. The horizontal surface is textured from the right edge of the crate to a horizontal distance l from the right edge of the crate.
(a) Find the magnitude and direction of the net force on the crate while it is on the rough surface.
(b) Find the net work done on the crate while it is on the rough surface.
(c) Find the speed of the crate when it reaches the end of the rough surface.
A 142Kg create is placed on an inclined ramp. when the angle the ramp makes the horizontal is increased to (alfa), the crate beging to slide downward.
runner a is initially 5.7 km west of a flagpole and is running with a constant velocity of 8.3 kmh due east. runner b
1) Given the equation x = 0.5 cos (0.75 π t), what is the amplitude of the wave? 2)Given the equation x = 0.5 cos (0.68 π t), what is the angular frequency of the wave? (Give the numeric value to 3 sig. fig.)
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge.
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet). what is the angle of refraction for each wavelength
A 0.54 kg banana is thrown directly upward with an initial speed of 3.1 m/s and reaches a maximum height of 0.47 m. What change does air drag cause in the mechanical energy
A series RLC circuit has a 100 Ω resistor, a 0.10 µF capacitor and a 2.0 mH inductor connected across a 120 Volt rms ac voltage source operating at (1000/pi) Hertz. Obtain the resonant frequency of this circuit
Is the plane of polarization of a polarizing polymer sheet in the similar direction as the molecular chain orientation? Describe . What is meant by optical activity?
Electrons in a photoelectric-effect experiment emerge from a copper surface with a maximum kinetic energy of 1.10 eV. What is the wavelength of the light?
a metal block of mass 1.230kg is hanging from a string. the tension in the string is 7.184n. the block is submerged in
A sprinkler mounted on the ground send out a jet of water at 30 degrees angle to horizontal. How far does the water travel before it hits the ground
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