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A cart is attached to a hanging mass by a string that passes over a pulley. When the cart moves on an incline at constant speed, it is in equilibrium; i.e., the net force on it is zero.
Write an equation for the work done by friction when the cart is moving up the track at constant speed.
Her speed when she is above the bar is 1.3 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and find out her altitude as she crosses the bar.
Ball A, rolling west at 3.0m/s, has a mass of 1.0kg. Ball B has amass of 2.0kg and is stationary. After colliding with ball B, ballA moves south at 2.0m/s. sketch the system, showing the velocities and momenta before andafter the collision. calcula..
A 13 g bullet traveling 235 m/s penetratesa 2.0 kg block of wood and emerges cleanly at 174 m/s. how fast does it move after the bullet emerges
One end of an insulated metal rod is maintained at 100 , while the other end is maintained at 0 by an ice-water mixture. Find the thermal conductivity of the metal
The objective of a refracting astronomical telescope has a focal length of 3.60 m. What is the angular magnification of the telescope
A recantangular block of wood floats in a calm lake. Show, if friction is ignored, determine an equation for the force constant
An object is placed to the left of a lens, and a real image is formed to the right of the lens. What is the focal length of the lens
what is the highest possible theoretical effeciency of a heat engine operating with a hot reseroir of furnace gases at
a 15.0 k ohms resistor is connected in series with a capacitor and a 24.0v battery. assume the switch is closed at time
The near point of a naked eye is 30 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.062 rad. A magnifying glass has a focal length of 17 cm, and is held next to the eye.
A machine part rotates at an angular speed of 0.44 rad/s; its speed is then increased to 1.5 rad/s at an angular acceleration of 0.78 rad/s2. Find the angle through which the part rotates
Two particles collide and stick together to form a new particle.First particle has a rest energy E0 and a kinetic energy 2E0.Second particle is stationary and has a rest energy 2Eo. Find therest energy and the speed of the new particle.
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