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What average force is needed to stop a 80kg man running at 4 m/s in a time of .5s?
320N
640N
40N
160N
At a distance r1 from a point charge, the magnitude of the electric field created with the charge is 337 N/C. At a distance r2 from the charge, the field has a magnitude of 180 N/C. Discover the ratio r2/r1.
A roller coaster has 8 cars, each of mass of 95.0 kg. The ride begins 47.5 m above the ground. What is the speed of the train
Mary throws a ball to Suzy, who is standing 25 meters away. Suzy catches the ball from the same height at which it was thrown. calculate initial vertical velocity and Horizontal velocity
what is the magnitude and direction of the force
What phase difference between two otherwise identical travelling waves, moving in the similar direction along a stretched string.
Iif the collision is perfectly elastic, what is the ball's speed immediately after the collision? Illustrate what is the maximum compression of the spring?
A boy drags his 8.00 kg sled at constant speed up a 10.0 degree hill. He does so by pulling with a 40.0-N force on a massless rope attached to the sled. find the coefficient of kinetic friction between sled and snow
A rocket with a mass of 53,000 kg (including fuel) is burning fuel at the rate of 150 kg/s and the speed of the exhaust gases is 6,000 m/s. If the rocket is fired vertically upward from the surface of the Earth, decide its height after 901 kg of its ..
A brick is thrown upward from the top of a building at an angle of 20 degrees to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 3 seconds how tall is the building
steel train rails are laid in 12m long segments placed end to end. the rails are laid on a winter day when their
A rifle with a weight of 25 N fires a 4.0-g bullet with a speed of 240 m/s. Find the recoil speed of the rifle
a force of 8n acts on an object on a frictionless horoizontal surface. the force acts in a vertical plane at an angle
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