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Q. A 72.00 {rm kg} person sits on a 4.00 {rm kg} chair. Each leg of the chair makes contact with the floor in a circle that is 1.20 {rm cm} in diameter. Find out the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
Q. What is the maximum speed with which a 1060kg car can round a turn of radius 75m on a flat road if the coefficient of static friction between tires and road is 0.80?
Uniform rate of acceleration
A sled starts up an incline of 350 with the horizontal. The sled starts from the bottom with an initial velocity of 5 m/s. (a) How far u p the incline does it go? A second sled starts to slide from the top when the first sled starts to slide down...
A circuit contains six 240 ohm lamps with 60 W bulbs and a 10 ohm heater connected in parallel. the voltage across the circuit is 120 V. If the circuit has a fuse rated at 12 A, would it melt if everything is on.
An electric motor rotating a workshop grinding wheel at a rate of 9.90 x 10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
A ball on a porch rolls 60cm to the porch's edge, drops 40cm, continues rolling on the grass, and eventually stops 80cm from the porch's edge. What is the magnitude of ball's total displacement, in centimeters.
What horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer.
suppose that visible light enters a Plexiglas cube containing water at a 20o angle of incidence, travels through the water and exits the cube.
Two long, parallel conductors carry currents I1 = 3.10 A and I2 = 5.10 A, both directed into the plane of the computer screen. Find out the magnitude and direction of the resultant magnetic field at a point midway between the wires. (b) Find out the ..
The distance between deer B and C is 92 m. What is distance between deer A and C.
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
Take the gravitational constant to be = 6.67×10^-11 Nm^2/kg, the mass of the earth to be = 5.97×10^24 kg, and the radius of the Earth to be = 6.38×10^6 m.
What minimum coefficient of static friction is required? Is the reply you found reasonable? In other words, is he probable to stay on the merry-go-round.
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