1
Question
Answer the following :
A. Name two factors on which the frictional forces depends.
B. Two chairs are being dragged, one empty while other is occupied. On which chair more frictional force is exerted?
[3 MARKS]
Answer the following :
A. Name two factors on which the frictional forces depends.
B. Two chairs are being dragged, one empty while other is occupied. On which chair more frictional force is exerted?
[3 MARKS]
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Solution
Part A : 1.5 Marks
Part B : 1.5 Marks
A. Factors :
(I) Friction depends on the nature (smoothness) of surfaces in contact.
(II) Friction depends on the net normal force acting at the surface of contact.
B. Friction is experienced more by the chair which is occupied . Friction is caused by the interlocking of irregularities in the two surfaces. It is obvious that the force of friction will increase if the two surfaces are pressed harder.
Part A : 1.5 Marks
Part B : 1.5 Marks
A. Factors :
(I) Friction depends on the nature (smoothness) of surfaces in contact.
(II) Friction depends on the net normal force acting at the surface of contact.
B. Friction is experienced more by the chair which is occupied . Friction is caused by the interlocking of irregularities in the two surfaces. It is obvious that the force of friction will increase if the two surfaces are pressed harder.
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