In the figure above the coefficient of static f... - JAMB Physics 2005 Question
A
5 ms-2
B
15 ms-2
C
3 ms-2
D
9 ms-2
correct option: a
Normal reaction R = 3 kg x 10 = 30N
coefficient of friction , μ = 0.5
∴ acting frictional force = μR = 30 x 0.5
Pulling/sliding force F = 6kg x 10 = 60N.
∴ Net downward force = ma = 60 - 15.0
=> (3 + 6)a = 45
∴ 9a = 45
a = 5m/s2
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