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The figure shows a lower leg being exercised. It has a 49-Nweight attached to the foot and is extended at an angle with respect to the vertical. Consider a rotational axis at theknee, as indicated. (a) When =89°, find the magnitude of the torque that the weight creates.(b) At what angle does the magnitude of the torque have a value of 15 N·m?
An electron passes through a point 3.01 cm from a long straight wire as it moves at 35.3% of the speed of light perpendicularly toward the wire. Find the magnitude of the electron\'s acceleration at that point
A deuteron (the nucleus of an isotope of hydrogen) has a mass of 3.34×10?27kg and a charge of 1.60×10?19C, Find the speed of the deuteron
A coin is placed on a turntable 13 cm from the center. A lump of clay placed behind the coin prevents it from sliding backwards , How long will it take before the coin begins to slide radially
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 12m above the moat. How far from the castle wall does the launched roch hit the ground
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.4 Hz. What is the total mass of the wire
Suppose a cannonball is fired into the air with an initial velocity of 35.0 m/s at an angle 32? above the horizontal. Ignore the effects of air friction. How far from the cannon will the second "half" land
Concept Simulation 3.2 reviews the concepts that are important in this problem. How much time does the ball spend in the air
A 13-kg block rests on a level floor. A 300-g glob of putty is thrown at the block so that the putty travels horizontally, hits the block, what is the initial speed of the putty
A simple pendulum is made from a string that is 0.65m inlength with a mass of 0.2 kg attached to the free end. The mass is pulled to one side through a small angle and released fromrest. What s the angular frequency and period of the pendulum? if t..
q1. an electron moves through a uniform magnetic field given by bx 3.00 bx. at a particular instant the electron has
a uniformly charged disk radius r and surface charge density 1.70 microcm2 lies in the xy plane with its center at the
Two freight cars, each with a mass of 2.4 multiplied by 105 kg, collide and stick together. One was at first moving at 3.4 m/s and the other was at rest. What is their final speed.
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