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A physics professor is pushed up a ramp inclined upward at an angle 28.0 above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 85.0 . He is pushed a distance 2.25 along the incline by a group of students who together exert a constant horizontal force of 603 . The professor's speed at the bottom of the ramp is 2.15 .
Use the work-energy theorem to find his speed at the top of the ramp.
v = ? m/s
Two forces are acting on a 0.250-kg hockey puck as it slides along the ice. what will be the magnitude and direction of the puck\'s acceleration
A car drives north at 42 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 62 mi/h. at last, it goes southwest at 30 mi/h for 6.0 {rm min}.
The moving non-conducting belt of a Van de Graaff generator carries 10 µC of charge up to the metal sphere each second, What minimum power must be supplied to the generator to sustain its operation
a rectangular loop of wire of length = 10cm, supporting a mass m = 1 gram, hangs vertically with one end in a uniform magnetic field B= 100 Gauss. What is the direction of the current
A uniform disk with a mass of 130 kg and a radius of 1.1 m rotates initially with an angular speed of 950 rev/min. How much work must this force do to stop the wheel
you are helping a friend you estimate it takes a force of 1665.5N to draw everything across the level grass at a constant speed. what is the coefficient of friction between the wood board and grass
An object is placed 12.0 cm in front of a converging lens of focal length 5cm. A concave mirror with radius of curvature 20.00 cm is located 30.00 cm in back of the lens. (Refer to attached picture)
Ship A is located 3.2 km north and 2.1 km east of ship B. Ship A has a velocity of 22 km/h toward the south and ship B has a velocity of 40 km/h in a direction 37° north of east. At what time is the separation between the ships least
A rocket is fired vertically upward. At the instant it reaches some altitude with a speed of 100 m/s. What is the velocity of the third fragment immediately after the explosion
The electrons in the beam of a television tube have a kinetic energy of 3.26 × 10-15 J. What is the acceleration of an electron due to this field component
A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.9 m/s. how far does the sled travel on the level surface before coming to rest
The circuit in the figure below consists of wires at the top and bottom and identical metal springs in the left and right sides. estimate the magnitude of the magnetic field
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