Suspended against gravity
A piece of wire with mass per unit length 70 runs horizontally at right angles to a horizontal magnetic field. A 5.7 current in the wire results in its being suspended against gravity.
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A simple pendulum has a mass of 0.650 kg and a length of 1.00 m. It is displaced through an angle of 13.0° and then released. Using the analysis model of a particle in simple harmonic motion, calculate the following. (Give your answer to the t
A roller coaster (375. kg) moves from A (5.00 m above the ground) to B (19.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car
A 100-kg barrel with a radius of 25.9 cm has two ropes wrapped around it, as shown in the figure. The barrel is released from rest, causing the ropes to unwind and the barrel to fall spinning toward the ground.
What does the card experiment in which people were not told the number of red and black cards reveal about people's attitude towards risk and uncertainty?
The first person is initially moving forward with a speed of 2.50 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
Blocks with masses of 4.0 , 8.0 , and 9.0 are lined up in a row on a frictionless table. All three are pushed forward by a 13 force applied to the 4.0 block. How much force does the 8.0 block exert on the 9.0 block?
What is the frequency shift of a 68 police radar signal when it reflects off a car moving at 117 ? (Radar waves travel at the speed of light.)
The position of a squirrel running in a park is given by r=[(0.280m/s)t+(0.0360m/s^2)t^2]+(0.0190m/s^3)t^3.
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