The coefficient of static friction between waxed skis and now snow is 0.14. what force will be needed to get a 700 n skier at rest moving?
a: 28 n
b: 70 n
c: 98 n
d: 980 n
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Ответ:
C. 98 N
Explanation:
The force needed to get the skier at rest moving must be at least equal to the maximum static frictional force acting on the skier, which is given by
where
W = 700 N is the weight of the skier
Substituting into the equation, we find
Ответ:
0 becouse it will still before falling
Explanation: