To stimulate a roller coaster, a cart is placed at the height of 4 m and allowed to roll from rest to the bottom. Find each of the following for the cart if friction can be ignored: a) the speed at the height of 1 m, b) the height when the speed is 3 m/s?
Not sure how to do these without a given mass.
Not sure how to do these without a given mass.
1 Answer
Explanation:
As it is said not to consider about frictional force,during this descent,total energy of the system will remain conserved.
So,when the cart was on top of the roller coaster,it was at rest,so at that height of
Now,when it will be at a height of
so,we can write,
or,
Putting,
Again,using the same equation,if you take
or,
or,
so, at