Homework Help Forum: 11th grade Physical Science

Posted by britney on Monday, November 2, 2009 at 6:07pm.

How fast must a 1,000 kg car be moving to have a kinetic energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h? How high would you have to lift a 1,000 kg car to give it a potential energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h?

• 11th grade Physical Science - bobpursley, Monday, November 2, 2009 at 6:14pm

  1/2 m v^2=Ke v= sqrt 2KE/m PE=mgh h= PE/mg

  
  

• 11th grade Physical Science - Anonymous, Wednesday, November 11, 2009 at 8:40am

  klngh

  
  

• 11th grade Physical Science - rose, Sunday, November 15, 2009 at 1:54pm

  A 2-kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.

  
  

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