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A puck of mass m = 1.90 kg slides in a circle of radius r = 23.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.80 kg by a cord through a hole in the table. What speed (in m/s) keeps the cylinder at rest?
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
A scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right hand scale
What mass of water at 30.0°C must be allowed to come to thermal equilibrium with a 2.15-kg cube of aluminum initially at 1.50 × 102°C to lower the temperature of the aluminum to 77.0°C? compute the mass of the aluminum cup
A window air-conditioner unit absorbs 9.70×104J of heat per minute from the room being cooled, What is the energy efficiency rating of the unit
The cylindrical beam of a 80.0 mW laser is 0.80 cm in diameter. What is the rms value of the electric field
You have a total charge Q=16fC. An amount q is to be put in one sphere, What value of q maximizes the electrostatic force between the two spheres
a car driving on the turnpike accelerates uniformly from 84.0 ft/s (57.3 mph) to 112 ft/s (76.4 mph) in 3.60s. what is the cars acceleration
A simple harmonic oscillator with m=0.815 kg and total energy E=135 J has amplitude 1.35m, Find the maximum acceleration
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 145 km/h. exactly 2.5 s after the speeder passes, police officer steps on accelerator; if the police car's acceleration is 2.10m/s^2.
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.00 m. compute the magnitude of the initial acceleration of the third sphere
A 20.0 kg box is pulled up a ramp a distance d = 15.0 m with a force of Fp = 165 N parallel to the ramp, as shown in the figure to the right. Find the work done on the block by gravity
Two mass-spring systems have the same mass and the same total energy. The amplitude of system 1 is three-fourths that of system 2. How do their maximum accelerations compare
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