In the sport of curling, two teams of ‘curlers’ take turns sliding polished granite stones across an ice surface towards a circular target marked on the ice.
A stone of mass 19.6 kg is accelerated uniformly for 1.25 s before being released by a curler.
The stone then decelerates uniformly to rest, travelling 32.5 m in a time of 17.5 s.
Calculate the average useful power developed by the curler in accelerating the stone.
Average power = .......................................................
Stone B is stationary. Stone A travels towards the target and makes a direct hit on stone B as shown. Both stones have mass m.
The collision is elastic. Just before the collision stone A has a velocity . After the collision stone B moves off with velocity .
Discuss how the relevant conservation laws apply to this collision.
While a stone is moving towards the target, the curlers vigorously sweep the ice directly in front of the stone.
Explain why this may make the stone travel further.
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