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Questions in Math tagged with "Energy"

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  Two 3.4g bullets are fired with speeds of 42.9m/s and 77.4m/s, respectively a) if the kinetic energy of the first bullet is 3.128697 in units of J.

  Posted by lala2pretty on Nov 22, 2009 at 11:49 AM

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  A 1.98kg ball is attached to a ceiling by a 2.1m long string. The height of the room is 5.95m.

  Posted by juniormax on Nov 22, 2009 at 11:43 AM

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  Two 3.4g bullets are fired with speeds of 42.9 m/s and 77 m/s, respectively.

  Posted by jharry23 on Nov 19, 2009 at 06:21 AM

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  A 46 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1 m/s. The acceleration of gravity is 9.8m/s^2.

  Posted by lala2pretty on Nov 19, 2009 at 06:17 AM

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  Work on an incline plane A 6.0 kg block is pushed 8.0 m up a rough 37 degrees inclined plane by a horizontal force of 75 N.

  Posted by jayjay00 on Nov 19, 2009 at 05:04 AM

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  A racing car has a mass of 1980 kg. The acceleration of gravity is 9.8 m/s^2.

  Posted by jayjay00 on Nov 16, 2009 at 05:30 AM

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  Two bullets have masses of 2.6 g and 5.7 g, respectively. Each is fired with a speed of 39.0 m/s.

  Posted by kela000 on Nov 16, 2009 at 05:25 AM

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  A moving car has kinetic energy. If it speeds up until it is going four times faster than before, how many kinetic energy does it have in comparison?

  Posted by harris123 on Nov 16, 2009 at 05:13 AM

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  If a golf ball and a ping-pong ball both move with the same kinetic energy, which has the greater speed?

  Posted by jharry23 on Nov 16, 2009 at 04:49 AM

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  Calculate the speed of an 6.6 x 10 to the fourth power kg airliner with a kinetic energy of 1.1 x 10 to the ninth power J.

  Posted by lala2pretty on Nov 16, 2009 at 04:46 AM

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  What minimum power must the motor deliver to lift the fully loaded elevator at a constant speed 3.25 m/s? Answer in units of kW.

  Posted by lala25 on Nov 5, 2009 at 05:47 AM

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  Find the work she does on the flight bag. Answer in units of J.

  Posted by jayjay00 on Nov 5, 2009 at 05:41 AM

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  A catcher "gives" with a baseball when catching it.

  Posted by jharry23 on Nov 4, 2009 at 05:58 AM

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  A rain cloud contain 5.37 x 10 to the seventh power kg of water vapor. The acceleration of gravity is 9.81 m/s^2

  Posted by lala2pretty on Nov 4, 2009 at 05:56 AM

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  One horsepower is equal to 746 watts. An automobile engine delivers 53.7 hp.

  Posted by hrrjack on Nov 4, 2009 at 05:50 AM

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  A horizontal force of 156N is used to push a 36.0 kg packing crate a distance of 7.00 m on a rough horizontal surface. /p>

  Posted by lala25 on Nov 4, 2009 at 05:48 AM

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  A skier of mass 72.3 kg is pulled up a slope by a motor-driven cable.

  Posted by kela000 on Nov 4, 2009 at 05:45 AM

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  A 1.00 x 10 to the third power kg car accelerates uniformly from rest to 11.3 m/s in 2.25 s.

  Posted by jayjay00 on Nov 4, 2009 at 05:39 AM

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  Water flows over a section of Niagara Falls at a rate of 1.2 × 106 kg/s and falls 71 m. The acceleration of gravity is 9.8 m/s2 .

  Posted by ispyy on Nov 3, 2009 at 07:07 PM

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  A shopper in a supermarket pushes a cart with a force of 38 N directed at an angle of 24 degree downward from the horizontal.

  Posted by jayjay00 on Nov 2, 2009 at 06:01 AM