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If the angular velocity is held constant and the radius is doubled, how does the force required change?
A massless string is wrapped around a solid disk of mass m_1 and tied to a block of mass m_2. The disk is free to rotate on a frictionless horizontal axle.
A 1-cm-thick layer of water stands on a horizontal slab of glass. After entering the glass, what is the ray's angle from the normal
In a tornado or hurricane, a roof may tear away from the house because of a difference in pressure between the air inside and the air outside. What is the magnitude of the force on the roof
Assume the sound speed in air is 343 m/s. A jet aircragt's engines emit an 850 Hz roar. What frequency do you hear if the aircraft approaches you at 540mph
Electric charge Q has been spread uniformly over a circular arc of radius R and central angle 40 degrees. What is the potential at point P, center of curvature of the arc.
You pull your 55.00 kg friend on a 5.00 kg sled across a patch of snow. You pull using a 48-N force on a rope that makes a 35 degree angle with the horizontal. If the friction force between the sled and the snow is a mere 5-N what is the normal fo..
A 6,500 kg bus traveling at 25 m/s collides head on with a 1,300 kg car traveling at 40 m/s. Find the resulting velocity of the vehicles
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 14.9 N. compute the volume of the object
A 770 kg car moving at 21 m/s brakes to a stop. The brakes contain about 15 kg of iron, which absorbs the energy. What is the increase in temperature of the brakes.
An electron and proton are separated by 2.0 nm. What is the net force on the system
What is the magnitude of the maximum displacement from the equilibrium of the top of the building, What is the maximum velocity of the top of the building
A student is trying to push a desk of mass m = 95kg and horizontal width w = 0.8m along the floor. What is the minimum force necessary to move the desk
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