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A house painter stands 3 m above the ground on a 4.9-m-long ladder that leans against the wall at a point 4.7 m above the ground. The painter weighs 692 N and the ladder weighs 108 N. Assuming no friction between the house and the upper end of the ladder, find the force of friction that the driveway exerts on the bottom of the ladder.
Ted is traveling on his railroad car (length 30 m) at speed v = 0.6 c as shown in the figure. As measured on Alice's clock, how long does it take for Ted's railroad car to pass Alice
1.you are holding a 6-kg dumbbell straight out at arms length. assuming your arm is 0.70 m long what torque is the
A cannon ball is fired from ground level with a speed of 60.0 m/s at an angle of 58 deg. above the horizontal. what is the speed of the cannon ball when it is directly above the wall
once upon a time, a stunt man would jump across the grand canyon a motorcycle. What minimum initial speed would be required to make across the canyon
A 2000w air conditioner and 700w refrigerator each operate on 120V rms. find current through air conditioner
An object is placed 50 cm in front of a convex mirror and its image is found to be 20 cm behind the mirror. What is the lateral magnification
Three pucks have masses m1=100g, m2=125g, and m3=150g. The pucks with masses m1 and ms move with velocities v1=4.00m/s in the negative-y direction, what is the angular momentum of the system
You are on a bridge which is a height 30m above the water. You first drop a ball and then 1.5 seconds later throw a second ball down so that both balls hit the water at the same time.
A system undergoes a 2-step process. In the first step, the internal energy of the system increases by 228J when 166J of work is done on the system. What type of process is the overall process
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.2 m when it is uncoiled. What current does the wire carry
Calculate the magnitude, the direction of resultant force and the coefficient of kinetic friction.
A storage tank at STP contains 19.1 kg of nitrogen What is the volume of the tank. What is the pressure if an additional 15.7kg of nitrogen is added without changing the temperature.
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