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A student applies a 1.5 Newton horizontal force on a box of weight 20 Newton at rest on the floor. The coefficient of static pressure is 0.3.
(a) Find the magnitude of the normal force acting on box?
(b) Find the magnitude of the static friction?
A man is applying a horizontal force in trying to push a 25 kilogram block up a frictionless plane inclined at an angle of 15o. Find the force needed just to keep the block in equilibrium
My car has rear defrosters that are made of 13 wires embedded into the rear window. They can melt a thin layer of ice, What is the cross-sectional area of each wire
A golf ball strikes a hard, smooth floor atan angle of θ = 26.4° and, as the drawing shows, rebounds at the sameangle. The mass of the ball is 0.037kg, and its speed is 45 m/s just before and after striking thefloor. What is the magnitude of the i..
Typical roller coasters only have one motor to pull the cars up to the top of the first and highest hill. explain why the first hill must be the highest
A cop car drives at 30m/s toward the scene of a crime, with its siren sounding (f = 2125 Hz.) Estimate the frequency heard by people at the crime scene as the siren approaches and the frequency heard as the siren moves away from people.
A small 12.8g plastic ball is tied to a very light 26.9cm string that is attached to the vertical wall of a room. Find the magnitude and direction of the electric field in the room
A merry-go-round in the park can be considered a circular disk of mass 100 kilogram and a radius of 2.0 meter. Obtain the resulting angular velocity of the merry-go-round
A person drops a cylindrical steel bar (Y = 1.00 × 1011 Pa) from a height of 1.00 m (distance between the floor and the bottom of the vertically oriented bar). The bar, of length L = 0.51 m, what is the maximum compression of the bar
At any given time, the magnitude of the magnetic field in a beam of sunlight is 1.7 x 10-6 T. What is the magnitude of the electric field at this time
A small particle with a mass of 2 kg carrying a charge of 2nC is at the surface of a charged spherical conductor of radius 3 mm. find the acceleration of the particle
a drinking fountain projects water at an initial angle of 50 degrees above the horizontaland the water reaches a
a charged particle is projected in a uniform electric field between two plates with initial velocity 5x103ms at angle
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