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A) a 50 kg trunk is pushed 6 m along a level floor at a constant speed of 4.2m/s.if the coefficient of friction is 0.20, calculate the work done by the applied force.
B) how much work was done by friction.
When blue light of wavelength 465 nm illuminates a diffraction grating, it produces a 1st order utmost but no 2nd order maximum.
To a person swimming 0.790m beneath the surface of the water in a swimming pool, what is the actual height of the diving board above the surface of the water
Amazingly, at exact distance that you calculated in question 2a (73.5 meters), there was a trampoline! Thinking quickly, I orient myself appropriately and hit the trampoline.
A 15kg crate is moved along a horizontal floor by pulling on it with a rope that makes a 30 degree angle with the horizontal. The tension in the rope is 200N and the crate slides a distance of 10m.
An extremely light rod 1.00 m long has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. find the moment of inertia of the system about the fixed axis
The coefficient of static friction is .6 and the ladder makes a 50 degree angle with the ground. Elucidate how far up the ladder can an 800 newton person climb before starts to slip
A spaceship is moving around the Earth in a 500- x 1000km orbit. At apogee, a retrorocket is fired in a direction exactly opposite to the spaceship's velocity vector. How much time elapsed between retrofire and impact
A bar magnet with its north pole pointing toward a coil of wire with a cross-sectional area of 0.020 m2, find the magnitude of the induced emf in the coil of wire
A 1000 kg car carrying four 84 kg people travels over a %u201Cwashboard%u201D dirt road with corrugations 3.8 m apart, by how much does the car body rise on its suspension
A young woman buys a sports car that can accelerate at the rate of 5.47m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.47s before Kathy. Stan ..
A satellite is rotating around a planet in a circular orbit. The radius of the orbit to the center of the planet is R = 2.4*107 m, Express the magnitude of the centripetal acceleration of the satellite ac in terms of the speed of the satellite v, an..
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
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