In an open circuit like the picture
1 answer:
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Answer:
2.6 m
Explanation:
From work energy theorem we deduce that
The kinetic energy equals to the work dine against friction energy.
Where m represent mass, v is the velocity, f is the frictional force and d is unknown distance that the player slides.
Making d the subject of the formula then
Then by substituting 450N for f, 65 kg for m and 6 m/s for v we obtain
Answer
given,
mass of ice hockey player = 110 Kg
initial speed of the skate = 3 m/s
final speed of the skate = 0 m/s
distance of the center of mass, m = 30 cm = 0.3 m
a) Change in kinetic energy
b) Average force must he exerted on the railing
using work energy theorem
W = Δ KE
F .d = -495
F x 0.3 = -495
F = -1650 N
the average force exerted on the railing is equal to 1650 N.