Question
In the winter sport of curling, players give a 20 kg stone a push across a sheet of ice. A curler accelerates a stone to a speed of 3.0 m/s over a time of 2 s.
a)How much force does the curler exert on the stone?
b)What average power does the curler use to bring the stone up to speed?
a)How much force does the curler exert on the stone?
b)What average power does the curler use to bring the stone up to speed?
Answers
The acceleration rate while pushing is 3.0/2 = 1.5 m/s^2
The force required to accelerate the stone at that rate is F = M*a = 30 N.
This assumes zero ice friction resistance. That is a fairly good assumption, since they travel so far.
Average power = (kinetic energy added)/(2 seconds)
= (M/2)Vfinal^2/Time = 45 watts
The force required to accelerate the stone at that rate is F = M*a = 30 N.
This assumes zero ice friction resistance. That is a fairly good assumption, since they travel so far.
Average power = (kinetic energy added)/(2 seconds)
= (M/2)Vfinal^2/Time = 45 watts
Related Questions
What winter sport do you like most?
1. I lke curling because it's fun to see players hit big stones...
Posted by rfvv on Friday, October 3, 2014 at 5:06am.
What winter sport do you like most...
A stone used in the sport of curling has a mass of 20.0 kg and is initially at rest, sitting on a fl...
A curling stone with mass 19.00 kg is released with an initial speed v0 sliding on level ice. The co...