Question

Dynamics

a) A picture is hung in equilibrium by two cords attached from its top corners.Both cords make an angle of 30° to the horizontal as shown in the diagram.The tension in the cords is 18 N

i) Calculate the horizontal component of the tension in each cable.

ii) Calculate the vertical component of the tension in each cable.

iii) State the weight, W, of the picture

b) The system of forces in the below is equilibrium. Find A and B.

c) A car weighs 15000N. What is the frictional force required to hold the car in equilibrium on a slope of 8° elevation?


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