Homework Help: Physical Science [repost]

Posted by mysterychicken on Sunday, May 3, 2009 at 4:11pm.

Can someone please check if my answers for these questions are correct? Thanks!

1.Explain in terms of force and distance how using a ramp to load boxes into a truck makes work easier.
(Ans-) Less force is applied but the distance is longer.

2.A ball sitting on the top of a table has potential energy but no kinetic energy. Describe how potential and kinetic energy can change as the ball falls off the table to the floor.
(Ans-) When the ball falls, the kinetic energy increases and potential energy decreases..

3.Explain how the thermal energy of a swimming pool compares to the thermal energy of a lake at the same temperature.
(Ans-) The swimming pool is larger than the lake so it has more particles.

Thanks again,
-MC

Physical Science [repost] - DrBob222, Sunday, May 3, 2009 at 4:28pm
1 and 2 look ok to me.
What you say about #3 is true; however, I don't think you have answered the question.
Physical Science [repost] - mysterychicken, Sunday, May 3, 2009 at 4:42pm
Rick P told me how to answer it the right way in my previous post...thanks a lot!
-MC

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