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A 2.00 x 103-kg car has a speed of 12.0 m/s. The car then hits a tree. The tree doesn’t move, and the car comes to rest.
1. Find the change in kinetic energy of the car.
2. Find the amount of work done in pushing in the front of the car.
3. Find the size of the force that pressed in the front of the car by 50.0 cm.
A rectangular loop of wire carrying a 4.0-A current is placed in a magnetic field of 0.60 T. What is the area of this loop
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A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor.
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A series RLC circuit has R = 70 ohm, L = 22 mH, and a resonant frequency of 4.0 kHz. Estimate what is the impedance of the circuit at resonance
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