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using a rope, a child pulls a box across a rough floor at constant speed. The tension in the rope is 105 N and the rope makes an angle of 37 with the horizontal.
Find the friction force acting on the box (due to the rough floor). Show all work.
Find out the force each hand exerts on the shaft when the shaft is rotating in the horizontal plane about its center at 5×10-2 {rm rev/s}.
Polymer diffusion and Calibration of an optical tweezer
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 50.5 m/s and returns the shot with the ball traveling horizontally, What is the impulse delivered to the ball by the tennis racquet
In a laboratory experiment, one end of a horizontal string is tied to a support while the other end passes over a frictionless pulley and is tied to a 1.9kg sphere, What is the diameter of the sphere
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
What is the speed of the two carts at the moment while their speeds are equal?
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
The equation of a transverse wave traveling on a string is given by y = A sin(kx - ?t) . Data: A=11 mm, k=73 rad/m, ?= 280 rad/s. What is the amplitude? What is the frequency? What is the wave velocity? What is the wavelength? For the same wave, f..
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
You want a screen to be illuminated with an intensity of 440 mW/m2. The screen is 12.97 m away from the light source, What is the rms value of the electric field at the screen
A 3.0 syringe has an inner diameter of 5.0, a needle inner diameter of 0.28, and the plunger pad diameter (where you place your finger) of 1.20.
You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 28.4N. What is the density
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