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Question1
A rock is thrown from edge of the top of a 100-ft tall building at some unknown angle above the horizontal. The rock strikes ground a horizontal distance of 160 ft from the base of the building 5.0 s after being thrown. Suppose that the ground is level and that the side of the building is vertical. Decide the speed with which the rock was thrown.
Question2
A 14.0-kg box is being pushed from bottom to the top of a frictionless ramp. When the box is pushed at a constant velocity, non conservative pushing force does 58.0 J of work. How much work is done by pushing force when the box starts from rest at a bottom and reaches the top of same ramp with a speed of 1.50 m/s?
A nonconducting sphere contains positive charge distributed uniformly throughout its volume. Which statements about the potential due to this sphere are true?
Positive point-charges of +36.0 mC (Micro C) are fixed at two of the vertices of an equilateral triangle with sides of 3.30 m, located in vacuum. Determine the magnitude of the E-field at the third vertex
A container with a pressure of 3 atmospheres and a temperature of 200c contains 36 gram of nitrogen. what is the mean distance between molecules, assuming that the container is a cube
A charged particle of mass m and positive charge q moves in a uniform constant electric and magnetic fields, E pointing in the y direction and B in the z direction, Find the electric force on the particle
The motion of peg P is constrained through the lemniscate curved slot in OB and by the slotted arm OA.
A 55-kW radio station broadcasts its signal uniformly in all directions. What is the average intensity of its signal at a distance of 250 m from the antenna
The component of the external magnetic field along the central axis of a 125-turn coil of radius 29.0 cm decreases from 2.90 T to 0.400 T in 2.40 s. what is the magnitude of the induced current in the coil
If you weigh 670 on the earth, illustrate what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0?
A horse walks in a 24 ft diameter circle, making 144 trips around the circle in one hour. Using the currently accepted value of 746 watts for 1 horsepower, calculate the force in pounds with which the horse must have been pulling.
What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}.
A 4.86 g bullet moving with an initial speed of vi = 439 m/s is fired into and passes through a 1.06 kg block. The block, initially at rest on a frictionless horizontal surface, is connected to a spring with the spring constant of 832 N/m.
A ship's mast reaches to a height of 15 meters above the surface of a 10-meter-deep lake. how long will the shadow of the mast
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