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1. A student lifts a 25 kg mass a vertical distance of 1.6 m in a time of 2.0 seconds.
a. Find the force needed to lift the mass (in N).
b. Find the work done by the student (in J).
c. Find the power exerted by the student (in W).
A star of radius 1 × 10^6 km rotates about its axis with a period of 48 days. Estimate the period of the neutron star
A 15.0-kg block rests on a horizontal table and is attached to one end of a mass less, horizontal spring. By pulling horizontally on the other end of the spring, someone reasons the block to accelerate uniformly and reach a speed of 5.00 m/s in 0.390..
Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. Which ball has greater kinetic energy
Consider an elastic collision in one dimension that involvesobjects of mass 2.5kg and 4.5kg. The larger mass is initially atrest, and the smaller one has an initial velocity of 12 m/s
A ball moving at 5.10 m/s strikes a stationary ball of the same mass. Calculate the velocity of the second ball after collision
a puck with a mass of .113 kg is spun clockwise around a center. its original distance from the center of rotation is
Write an algorithm for computing total flight time and the horizontal distance traveled by the cannon ball for the problem? with explanation.
A .01 kg bullet is fired into a 5.0 kg wood block that is at rest on a level wood table. The block, with the bullet embedded, slides .05 m across the table. What was the initial speed of the bullet
A straight wire of radius R carries uniform current density j. Find the magnetic field inside and outside the wire as a function of r, the distance from the center of the wire. Let m be the permeability of free space.
A wood- sphere of radius 10 centimeter has a core of lead, also in the shape of a sphere. Determine the mass of wood and lead portions
A simple pendulum 2.0 m in length, is released at 25 degrees from the vertical. what is the speed at the bottom of the swing
A copper wire 100 cm long and .20 cm in diameter is suspended from a solid support. A 10 kg mass is hung from the lower end of the wire. Determine the stress of the wire and determine the strain in the wire.
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