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A man drags a 76-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 25° above the horizontal, and the strap is inclined 61° above the horizontal. The center of gravity of the crate coincides with its geometrical center, as indicated in the figure. Discover the magnitude of the tension in the strap.
A mouse of mass m jumps on the outside edge of a freely turning ceiling fan of rotational inertia I and radius R. By what ratio does the angular velocity change
what are the ax and by components of the vector that must be added to the following three vectors so that the sum of
A disk of mass m1 and radius R1 is rotating about the center around a thin axle with an initial angular velocity of ω. Evaluate the initial angular momentum of the system
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 400-g sample of silver at an initial temperature of 88°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibriu..
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet), what is the angle of refraction for each wavelength
q1. points a and b have electric potentials of 320 and 160 respectively. when an electron released from rest at point a
A 0.037 kg aluminum bullet traveling at 460 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
According to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by find out how much water it displaced. The density of gold is 19.3g/cm^3. If the crown's mass was 6.00 * 10^2g, what volume ..
A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. (a) How long is the ball in the air?
One cylinder in the diesel engine of a truck has an initial volume of 600 cm3. Air is admitted to the cylinder at 30 0C and a pressure of 1.0 atm. The piston rod then does 400 J of work to rapidly compress the air. What are its final temperature and ..
a baseball player hits a triple and ends up on third base. a baseball diamond is a square each side of length 29 m with
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