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Q1. A worker stands still on a roof sloped at an angle of 40° above the horizontal. He is prevented from slipping by a static frictional force of 324N. Find out the mass of worker.
Q2. A 29.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 85.0 N and is directed at the angle of 30.0° above the horizontal. Find out the coefficient of kinetic friction.
A jet airplane flying from Darwin, Australia, has an air speed of 256 m/s in a direction 5.0° south of west. What is the magnitude of the velocity of the airplane relative to earth
When two carts having the same mass and the same speed collide and bounce off of each other elastically, what is the final total momentum of the carts
You have determine that it takes 3s for a toy car ti travel through the distance of 162 cm. calculate the average speed of the toy car
A 63.0kg skier is moving at 6.55m/s on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.55m long. How fast is the skier moving when she gets to the bottom of the hill
A 1.9-kilogram mud ball drops from rest at a height of 18 m. If the impact between the ball and the ground lasts 0.56s, Find the final velocity of the 4.90-kg ball if the collision is elastic
A generator rotates at 87Hz in a magnetic field of 9.0×10?2T . It has 600 turns and produces an rms voltage of 180V, find the area of each turn of the coil
The magnetic field in a radio wave traveling through air has amplitude 2.5 10-11 T and frequency 2.9 MHz. Find the amplitude and frequency of the electric field
your friend gets a at tire while driving up a road with a 35.0 slope. While changing the tire he lets go of the spare and it begins to roll down the hill. How fast (m/s) is the tire moving when it hits the ..
What must the charge (sign and magnitude) of a particle of mass 1.44g be for it to remain stationary when placed in a downward directed electric field of magnitude 660 N/C.
A golf ball strikes a hard, smooth floor at an angle of 30.0?? and, as the drawing shows, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
A 150 g Copper bowl contains 220 g of water, at an initial temperature T1. A 300 g Copper cylinder at 7000 C is dropped into the water, How much energy is transferred to the bowl
A 0.954-kg toy car is powered by 2 C cells (3.00V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 52.6%, What is the average current supplied to the car\'s motor
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