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It's area contact will effect the frictional forces and coefficient and friction?
A 70-kg man and a 55-kg woman holding a 2.50-kg purse on ice skates stand facing each other. What is the woman's recoil speed
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
A kg steel ball strikes a wall with a speed of m/s at an angle of with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for s, what is the average force exerted on the ball by the wall.
A light-rail commuter train blows its 200 Hertz horn as it approaches a crossing. Find what frequency does the observer receive as the train moves away
The step-down transformer in a local neighborhood reduces the voltage from a 7,200 V line to 120 V. If there are 125 loops on the secondary, how many are on the primary coil
The rear window of a car consists of thirteen thin wires (resistivity = 88.0 * 10^-8 ohms) embedded in the glass. Find the cross-sectional area of each wire
as a 15000 kg jet plane lands on an aircraft carrier its tail hook snags a cable to slow it down. the cable is attached
The overall length of a piccolo is 32.0 cm. The resonating air column vibrates as in a pipe that is open at both ends. (a) Find the frequency of the lowest note a piccolo can play. Hz (b) Opening holes in the side effectively shortens the length of t..
A 120-V motor has mechanical power output of2.10hp. It is84.0%efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A rectangular loop of 250 turns is 33cm wide and 17cm high. What is the current in this loop
The figure shows a toroid with N total turns and a current I . Apply Ampere's Law to find the magnitude of the magnetic field inside the toroid and at a distance r from the axis of the toroid. [Make sure you draw a diagram to show the Amperian loo..
An elevator cab that weighs 27.7 kN moves upward. Find what is the tension when the cab's speed is decreasing at the rate of 1.84 m/s2
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