In the winter sport of curling, players give a 20 kgstone a push across a sheet
ID: 1997535 • Letter: I
Question
In the winter sport of curling, players give a 20 kgstone a push across a sheet of ice. The stone moves approximately 40 m before coming to rest. The final position of the stone,in principle, only depends on the initial speed at which it is launched and the force of friction between the ice and the stone, but team members can use brooms to sweep the ice in front of the stone to adjust its speed and trajectory a bit; they must do this without touching the stone. Judicious sweeping can lengthen the travel of the stone by 3 m.
C.) Suppose the stone's mass is increased to 40 , but it is launched at the same 3 . Which one of the following is true?
a. The stone would now travel a longer distance before coming to rest.
b. The stone would now travel a shorter distance before coming to rest.
c. The coefficient of friction would now be greater.
d. The force of friction would now be greater.
Explanation / Answer
a) Here , frictional force = u * m*g
as the acceleration due to frictional force is given as
a = u * g
which is independent of mass of stone
Now, as the initial velocity is same , the stone will travel same distance before stopping
the correct option is d. The force of friction would now be greater.