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A moving 2.7 kg block collides with ahorizontal spring whose spring constant is 426N/m (see figure). The block compresses the springa maximum distance of 15.0 cm from its rest position. Th ecoefficient of kinetic friction between the block and the horizontal surface is 0.14.
A) What is the work done by the spring in bringing the block torest?B) How much mechanical energy is beingdissipated by the force of friction while the block is being brought to rest by the spring?C) What is the speed of the block when it hitsthe spring?
A 5.7x10^2 kg hot-air balloon takes off from rest at the surface of the earth. The wind and lift forces take the balloon up, doing +9.7 x 10^4 J of work on the balloon in the procedure. At what height above the surface of the earth does the balloo..
An ideal gas at 20 ?C consists of 2.2×1022 atoms. 5.9J of thermal energy are removed from the gas. What is the new temperature in ?C
a cylindrical aluminum pipe of length 1.57 m has an inner radius of 2.20 x 10-3 m and an outer radius of 2.80 x 10-3 m.
a bullet is fired into a large stationary absorber and comes to rest. temperature measurements of the absorber show
Puffy cumulus clouds, which are made of water droplets, occur at lower altitudes in the atmosphere. Find the altitude y (measured from sea level) above which wispy cirrus clouds can occur.
A stick of mass M is held by supports at each end, with each support providing a force of Mg/2. PWhat forces do the three support now provide
A 322 g oscillator has a speed of 113.0 cm/s when its displacement is3.00 cm and 76.0 cm/s when its displacement is6.90 cm. What is the oscillator's maximum speed
an elevator moves downward in a tall building at a constant speed of 4.95 ms. exactly 5.50 s after the top of the
Two parallel slits are illuminated by light composed of two wavelengths, on of which is 645 nm. On a viewing screen, the light whose wavelength is known produces its third dark fringe at the same place where the light whose wavelength is unknown ..
A car accelerates uniformly from rest for 20 seconds with anacceleration of 1.5m/s2. determine the acceleration while slowing down
A 47.7 kg girl is standing on a 127 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the ice surface
While surveying a cave, a spelunker follows a passage 190{\rm m} straight west, then 210{\rm m} in a direction 45.0^\circ east of south, and then 260{\rm m} at 30.0^\circ east of north. After a fourth unmeasured displacement, she finds herself back w..
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