Interactive learningware 5.2 illustrates good problem-solving techniques for this type of problem. two cars are traveling at the same speed of 21 m/s on a curve that has a radius of 127 m. car a has a mass of 1010 kg, and car b has a mass of 1610 kg. find (a) the magnitude of the centripetal acceleration and (b) the magnitude of the centripetal force for car a, (c) the magnitude of the centripetal acceleration and (d) the magnitude of the centripetal force for car b.

(a)

(b)

(c)

(d)

Explanation:

(a) Find the magnitude of the centripetal acceleration for Car A:

(b) Find the magnitude of the centripetal force for Car A:

(c) Find the magnitude of the centripetal acceleration for Car B:

As the centripetal acceleration depends of the velocity and the radius, the magnitude of the centripetal acceleration for the Car B is the same as the centripetal acceleration for the Car A.

(d) Find the magnitude of the centripetal force for Car B:

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))