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An 80 kg man is one fourth the way up a 10m ladder that isresting against a smooth frictionless wall. The ladder has a massof 20kg and it makes an angle of 60 degrees with the floor.
What is normal force of the wall on the ladder?
What is the normal force of the floor on the ladder?
What is the coeffecient of static friction between the floorand the ladder?
work function of potassium is 2.225 eV. Find the cutoff wave length of potassium, find the frequency of the x-ray
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 53.9 meters per second squared. The acceleration period lasts for time 9.00s until the fuel is exhausted. After that, the rocket is in free..
one mole of an ideal gas at 1 atm and 0 c is compressed isothermally from 50l to 20l during this process energy is
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a 0.5kg block at rest on a table is attached to a horizontal spring with a spring constant k200 nm. the spring is
Two objects of mass m and 9m undergo a completely inelastic collision in one dimension. what was the ratio of their speeds before the collision
Draw and explain the internal combustion engine as it relates to carnot cycle and otto cycle
An object, with mass m and speed v relative to an observer, explodes into two pieces, How much kinetic energy is added to the system during the explosion
The compressor of an air conditioner draws an electric current of 20.7 A when it starts up. how much electric charge passes through the circuit
Two atomic clocks are carefully synchronized. One remains in New York, and the other is loaded on an airliner that travels at an average speed of 250m/s, Which clock will show the shorter elapsed time
Two forces, 1 and 2, act on the 5.00 kg block shown in the drawing. What is the horizontal acceleration (magnitude and direction) of the block
A ball is thrown horizontally from the top of a 75 m building and lands 130 m from the base of the building, What is the vertical component of the velocity just before the ball hits the ground in m/s
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