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An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft.
(a) Calculate the work done by gravity on the elevator before it hits the spring.
(b) Calculate the speed of the elevator just before striking the spring.
(c) Calculate the amount the spring compresses.
The skier's mass is 59.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.100. Find out the magnitude of the force that the tow bar exerts on the skier.
find electric field produced by the particles equal to zero. Find out the x and y components of this force.
A lighted candle is placed 36 cm in front of a converging lens of focal length f1= 13 cm, calculate the position and relative size of the final image
A centrifuge in a medical laboratory rotates at an angular speed of 3800 rev/min. Find the constant angular acceleration of the centrifuge
The plane of a 7.0 cm × 10.0 cm rectangular loop of wire is parallel to a 0.16-T magnetic field. The loop carries a current of 7.0 A. What is the magnetic moment of the loop?
A baseball pitcher can throw a ball with a speed of 40. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 30. What is the speed of truck.
The centripetal and tangential accelerations are equal
A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 230-g cube of copper that is initially at 85°C, What is the mass of the aluminum chunk
A cylinder with a moveable piston contains 178 mL of nitrogen gas at a pressure of 1.22 atm and the temperature of 298 K. What should the final volume be for the pressure of the gas to be 1.52 atm at a temperature of 335 K.
A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.
A 85-tonne (1 t = 1000 kg) spacecraft moving in the + x-direction at 0.38m/s docks with a 70-tonne craft moving in the -x-direction at 0.62m/s
How much work must be completed to accelerate a baton from rest to an angular speed of 7.79 rad/s about its center? Consider the baton to be a uniform rod of length 0.596m and mass 0.495kg.
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