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Bob and Ray push on a door from opposite sides. They both push perpendicular to the door. Bob pushes 0.63 m from the door hinge with a force of 89 N. Ray pushes 0.57 m from the door hinge with a force of 98 N, in a manner that tends to turn the door in a clockwise direction. What is the net torque on the door?
q1. a 430g block slides along a frictionless surface at a speed of 0.35 ms. it runs into a horizontal massless spring
The top of a tower much like the leaning bell tower at Pisa, Italy, moves toward the south at an average rate of 1.4 mm/y, what is the average angular speed of the tower's top about its base
A fisherman wants to know the mass of a trout he just caught but does not have scales. What is the mass of the fish
q1. a straight 2.60 m rod pivots around a perpendicular axis so that it can swing freely in a horizontal plane. jane
A tsunami travelling across deep water can have the speed of 750 {rm km/h} and a wavelength of 360 km. what is the frequency.
A car entering a freeway ramp accelerates from 14 m/s to 25 m/s in 10 seconds. what is the cars average acceleration during this 10 seconds.
1.8 kilograms of water are changed, from ice at 0ËšC into liquid water at 0ËšC determine the change in mass of the water
The Eskimo pushes the same 50.0-kg sled over level ground with a force of 2.25 102 N exerted horizontally, evaluate the coefficient of kinetic friction
Jonathan and Jane are sitting in a sleigh that is at rest on frictionless ice. Jonathan's weight is 850N, Jane's weight is 550N , Calculate the magnitude of the sleigh's horizontal velocity after they jump out
A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field
question1a boat crosses a river of width 228 m in that the current has a uniform speed of 1.97 ms. the pilot maintains
A 0.60 nF parallel-plate capacitor has plate area A = 1.4×10?4 m. what is the plate separation
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