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A simple pendulum is made from a L long string and a small ball, mass=m, attached to its free end. The ball is pulled to one side through a small angle and then released from rest.
a) Proof that the momentum (parallel with tangential movement), is (dp/dt)=-mgsin?=-mgsin(s/L) Theta being the angle and s=L?.
b) Write the lenght of the curve s(t) and specify the time period for small oscillations.
What is its initial velocity as it leaves the ground. Two particles are fixed on an x axis.
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How fast can this car round a second curve of radius 320m?
A constant horizontal force a pushes a kg FedEx package across a frictionless floor on which an xy coordinate system has been drawn. package's x and y velocity components versus time t.
A steel safe with mass 2200 kg falls onto concrete. Just before hitting the concrete its speed is 40 m/s, and it smashes without rebounding and ends up being 0.06 m shorter than before. What is an approximate magnitude of the force exerted on the ..
Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work completed by each force.
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finding the thermal conductivity (k) of a box with total surface area of 1.20 m and a wall thickness of 4cm is made of an insulating material. a 10 W electric heater inside the box maintain the inside temp. at 15 C above the outside temp.
implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves).
The total mechanical energy of the spacecraft, assume that the gravitational potential energy is zero at an infinite distance from the Earth.
The coefficient of kinetic friction is 0.400. Illustrate what should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
A spring with 58 hangs vertically next to a ruler. The end of the spring is next to the 11- mark on the ruler. If a 2.5- mass is now attached to the end of the spring, illustrate where will the end of the spring line up with the ruler marks?
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