Physical Science [repost]
posted by mysterychicken .
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.