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A 25 kg box sits on an incline of 30 degrees. The coefficient of kinetic friction between the box and the incline is .21. Find the acceleration of the box down the incline.
The displacement of a particle in meters moving along x axis is given by x=18t+5t^2, calculate instantenaous velocity at t=2 seconds and instantaneous accelration
An escalator moves 10 people (60 kg each) per minute from the first floor of a store to the second floor, 5 m above. what is the average power required
At 20.0°C, a mainly silicon resistor has a resistance of 665 ?, and a tungsten resistor has a resistance of 752 ?. At what temperature will their resistances be equal
A gymnast with mass m1 = 49 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 119 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..
A person runs in a straight line at an initial velocity of 4.5 m/s. He accelerates at 1.2 m /s2 with 13 sec. Determine how far does the man go
a uniform rod of length 0.820 m and mass 13.0 kg is balanced on a sharp edge at 0.660 m from the left end. at the left
A 5.4 ball hangs from a steel wire 1.80 in diameter and 6.00 long. What would be the speed of the wave in the steal wire
during the first stage of its launch a space shuttle goes from rest to 4996 while rising a vertical distance of 45.0.
If the cross-sectional area of the stream decreases by factor of 10× while passing through the dam, can you catch and save the weasel before it moves past the dam (X), down the waterfall?
an astronaut weighs 150 lbs on the surface of the earth. what does she weigh if she is resting in the space shuttle
A snow maker at a resort pumps 260 kg of lake water per minute and sprays it into the air above a ski run. how much heat does the snow-making process release each minute
Two small charges with a mass of 1.0 g each are connected by a 2.0 cm long insulating rod of negligible mass. What is the dipole moment of the rod
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