An emf of 9.7 × 10-3 V is induced in a coil while the current in a nearby coil is decreasing at a rate of 2.7 A/s. What is the mutual inductance of the two coils?
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- Starting from a standstill, Abi (mass = 55.00 kg) performs a vertical jump. a.) How much does Abi weigh (in Newtons)?You want to lift a heavy box with a mass L = 91.0 kg using the two-ideal pulley system as shown. With what minimum force do you have to pull down on the rope in order to lift the box at a constant velocity? One pulley is attached to the ceiling and one to the box. Lkg NA 110 kg scaffold is 5.80 m long. It is hanging with two wires, one from each end. A 420 kg box sits 1.90 m from theleft end. What is the tension in the right hand side wire? (g = 9.8 m/s2) please show the full solution, thank you.
- Luke and his friends will play pinata game. He attached the 5 kg pinata to a string, and he is pulling it from a frictionless pulley. a. To make the pinata stable, how much force must Luke exert? Show FBD.Two cables are tied together at C and are loaded as shown. Knowing that P = 3567, α = 45.8° and θ = 54.2°, determine the tension in cable BC.A friction experiment is performed on a planet that has the same mass as Earth but half the radius. A 1.0-kg block is pulled along a horizontal dynamics track with a horizontal force of magnitude 15.0 N. If the coefficient of kinetic friction between the block and the track is 0.3, determine the acceleration of the block. O a. 14.26 m/s^2 O b. 12.06 m/s^2 O. 3.24 m/s^2 Od. 15.00 m/s^2
- An empty elevator car of a building has a mass of 1 metric ton. It has a counterweight with a mass of 1.2 metric tons. What force must the motor of the elevator pull on the counterweight to make the elevator car go down with an acceleration of 0.5 m/se/sec? a. 12000 N b. 3057 N c. 11171 N d. 10310 NA person of weight 490 N stands on a scale in an elevator. What will the scale be reading? when the elevator is accelerating downward at 6 m/s² A. 190N В. 790N С. 490N D. Zero В O D O AA 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s2.a. What is the magnitude of the normal force of the elevator floor on the dog?A. 34 N B. 43 N C. 49 N D. 55 N E. 74 Nb. What is the magnitude of the force of the dog on the elevator floor?A. 4.2 N B. 49 N C. 55 N D. 43 N E. 74 N