General Physics

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Bounty	Status	Question	Due
Here are the questions in Physics » General Physics. Go get 'em! 1-20 of 28 \| Next
$9.00	Answered	please help me to understand moment of inertia i need tutoral on moment of inertia	Nov. 06, 2109
$0.25	Answered	Can you show me how to do this problem Billy,a mountain goat, is rock climbing on his favorite slope one sunny spring morning when a rock comes hurtling toward him from a ledge 40.0 m above. Billy ducks and avoids injury. a) How fast is...	Nov. 27, 2009
$5.00	Answered	phsics question in a test of a catapult a boulder is fired over a wall, the distance from the catapult to the wall is 40 meters, the boulders reaches its maximun height of 15 meters as it passes directly above yhe...	Nov. 10, 2009
$1.00	Unanswered	phsyics problem a hard rubber ball,released at chest height,falls to the pavement and bounces back to nearly the same height.while it is in contact with the pavement,the lower side of the ball is temporarirly...	Nov. 09, 2009
$1.00	Answered	single slit experiment Light from a sodium lamp illuminates two narrow slits. The fringe spacing on a screen 150 behind the slits is 4.0 .What is the spacing (in ) between the two slits?	Nov. 08, 2009
$1.00	Answered	physics A grindstone increases in angular speed from 4.00 rad/s to 12.00 rad/s in 4.00 s. Through what angle does it turn during that time if the angular acceleration is constant? 1 8.00 rad 16.0 rad ...	Nov. 08, 2009
$1.00	Answered	physics Consider the following. (a) Find the angular speed of Earth's rotation about its axis. 1 rad/s (b) How does this rotation affect the shape of Earth? 2	Nov. 08, 2009
$1.00	Answered	physics A wheel has a radius of 4.7 m. How far (path length) does a point on the circumference travel if the wheel is rotated through angles of 30°, 30 rad, and 30 rev, respectively? 30° 1 m 30...	Nov. 08, 2009
$1.00	Answered	physics The tires on a new compact car have a diameter of 2.0 ft and are warranted for 56 ,000 miles. (a) Determine the angle (in radians) through which one of these tires will rotate during the warranty...	Nov. 08, 2009
$1.00	Answered	physics A potter's wheel moves uniformly from rest to an angular speed of 0.21 rev/s in 35 s. (a) Find its angular acceleration in radians per second per second. 1 rad/s 2 (b) Would doubling the angular...	Nov. 08, 2009
$1.00	Answered	physics A dentist's drill starts from rest. After 2.80 s of constant angular acceleration it turns at a rate of 2.8 10 4 rev/min. (a) Find the drill's angular acceleration. 1 rad/s 2(b) Determine the angle...	Nov. 08, 2009
$1.00	Answered	physics A centrifuge in a medical laboratory rotates at an angular speed of 3750 rev/min. When switched off, it rotates through 50.0 revolutions before coming to rest. Find the constant angular acceleration...	Nov. 08, 2009
$1.00	Answered	physics A machine part rotates at an angular speed of 0.55 rad/s; its speed is then increased to 2.6 rad/s at an angular acceleration of 0.71 rad/s 2. (a) Find the angle through which the part rotates...	Nov. 08, 2009
$1.00	Answered	physics The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.56 m and 1.01 m, respectively. The respective rotational speeds are 459 rev/min and 4142 rev/min. Calculate the...	Nov. 08, 2009
$1.00	Answered	physics The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 9.0 s. At this point, the person doing the laundry opens the lid, and a safety...	Nov. 08, 2009
$1.00	Answered	physics A car initially traveling at 29.7 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s 2 after its brakes are applied. (a) How many revolutions does each tire make before the car...	Nov. 08, 2009
$1.00	Answered	physics A 47.9 -cm diameter disk rotates with a constant angular acceleration of 2.9 rad/s 2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk...	Nov. 08, 2009
$1.00	Answered	physics A rotating wheel requires 9.00 s to rotate 30.0 revolutions. Its angular velocity at the end of the 9.00 s interval is 96.0 rad/s. What is the constant angular acceleration of the wheel? 1 rad/s 2	Nov. 08, 2009
$1.00	Answered	physics An electric motor rotating a workshop grinding wheel at a rate of 91 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.50 rad/s 2. (a) How long...	Nov. 08, 2009
$1.00	Answered	physics Determine the required height h of the crest of the roller coaster so that when it is traveling with a speed of 10 m/s at the top of the track it will reach a speed of 38 m/s when it comes to the...	Nov. 08, 2009