(1) draw free body diagram; (ii) determine the coefficient of friction; (ii) normal force; (iv) frictional force. Pulley 50° 1 kN W Figure Q3(a) (b) If the angle of inclination of the string connecting pulley and the block is increased, explain its effect on normal force and frictional force, assuming the weight of the block remains same. Refer to Figure Q3(a).

International Edition---engineering Mechanics: Statics, 4th Edition
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Chapter7: Dry Friction
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Q 3(a) A block of weight 1 kN is attached to a string which passes over a smooth
pulley. When a weight of W = 500 N is attached to the string as shown in
Figure Q3(a), the block is on the point of moving. Perform the following;
(1)
draw free body diagram;
(ii)
determine the coefficient of friction;
(ii)
normal force;
(iv)
frictional force.
Pulley
50°
1 kN
W
Figure Q3(a)
(b)
If the angle of inclination of the string connecting pulley and the block is
increased, explain its effect on normal force and frictional force,
assuming the weight of the block remains same. Refer to Figure Q3(a).
Transcribed Image Text:Q 3(a) A block of weight 1 kN is attached to a string which passes over a smooth pulley. When a weight of W = 500 N is attached to the string as shown in Figure Q3(a), the block is on the point of moving. Perform the following; (1) draw free body diagram; (ii) determine the coefficient of friction; (ii) normal force; (iv) frictional force. Pulley 50° 1 kN W Figure Q3(a) (b) If the angle of inclination of the string connecting pulley and the block is increased, explain its effect on normal force and frictional force, assuming the weight of the block remains same. Refer to Figure Q3(a).
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