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Q. You push a 1.8 kg block against a horizontal spring, compressing the spring by 26 cm. After that you release the block, and the spring sends it sliding across a tabletop. It stops 90 cm from where you free it. The spring steady is 370 N/m. What is the coefficient of kinetic friction between the block and the table?
Q. A 230-kg crate is pushed horizontally with a force of 680-N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
At the same time, car 2 is 1.2 east of mile marker 0 travelling at 30 due wests. Car 1 is speeding up with an acceleration of magnitude 0.20, and car 2 is slowing down with an acceleration of magnitude 0.60.
What is decrease in kinetic energy throughout the collision.
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
A ball dropped from a height of 4.00 m makes an elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, a) show that the ensuing motion is periodic, b) find the period of the motion.
A photoflash unit makes a very bright light for a very short time. Discuss differences in the exposure of the film with and without a flash unit. Consider the f-stop and shutter speed in your deliberation.
The components of a simplest clamping circuit.
A Carnot engine performs work at the rate of 480 kW as using 640 kcal of heat per second. If the temperature of the heat source is 540°C, at what temperature is the waste heat exhausted.
What would be the equilibrium temperature when a 256 g block of copper at 314 °C is placed in a 140 g aluminium calorimeter cup containing 827 g of water at 11.5 °C.
Assume the helmholtz coil consists of two sets of coaxial wire loops with 15 turns of radius R=75.00 cm, that are separated by R, and each coil carries the current 0.123A flowing in the same direction. Compute the magnitude and direction of magnetic ..
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
An astronaut is rotated in a horizontal centrifuge at a radius of 7.5 m. (a) What is the astronaut's speed if the centripetal acceleration has a magnitude of 5.4g? (b) How many revolutions per minute are required to produce this acceleration.
Billy has a bucket that has a mass of 150 g, in which he put 150 g of fresh water. He has tied 150-cm of string to the handle of the bucket.
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