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A weightlifter stands up from a squatting position whileholding a heavy barbell across his shoulders.
1. Draw a freee-body diagram for the barbells.
2. Draw a freee-body diagram for the weight lifter.
A 67? resistor, an 9.0?F capacitor, and a 36mH inductor are connected in series in an ac circuit. Calculate the impedance for a source frequency of 300 Hz
q1. a 78.9 kg man steps off a platform 4.57 m above the ground. he keeps his legs straight as he falls but at the
Convex mirrors are often used in sideview mirrors on cars. Many such mirrorsdisplay the warning “Objects in mirror are closer than they appear.” Assume a convex mirror has a radius of curvature of magnitude 14 m and that there is a car that is 11 ..
Water flows at 0.990m/s from a hot water heater, through a 450-kPa pressure regulator. What is the flow speed in this pipe
A box of mass 32 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 48 meters. What is the magnitude of for..
You're planning to study in Europe, and you want a transformer designed to step 230 V. how many should the secondary have
A fictional spaceship accelerates at a constant rate of 0.104 m/s2. How long would it take to reach the moon, 4.08 108 m away
How fast is the top of the tree moving (in m/s) just before it hits the ground? Model the tree as straight, rigid rod, and ignore friction and air resistance.
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you find in part (a). Illustrate what should be the maximum speed of the car so it can round the curve safely?
Three athletes are tugging on a ring. Martha pulls with a force of 150 N in the northerly direction. Eveylyn pulls with a force of 100 N in the easterly direction. Sara pulls with a force of 200 N in the southwesterly direction (225 degrees clockw..
The potential on the axis of a uniformly charged disk at 5.5cm from the disk center is 140V ; the potential 12cm from the disk center is 110V. Find the disk radius in cm
A room with 2.9m high ceilings has a metal plate on the floor with V= 0V and a separate metal plate on the ceiling. How high does the ball go if the ceiling voltage is 3.5×10^6V
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