UNIT 4:

Turning Effect of Forces...
Numerical Problems...

Numerical No: 4.1,4.2,4.3,4.4,4.5,4.6,4.7,4.8,4.9,4.10

NUMERICAL NO: 4.1

• Find the resultant of the following forces:

  • 10 N along x-axis
  • 6 N along y-axis
  • 4 N along negative x-axis


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NUMERICAL NO: 4.2

• Find the perpendicular components of a force of 50 N making an angle of 30 degree with x-axis.


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NUMERICAL NO: 4.3

• Find the magnitude and direction of a force, if its x-component is 12 N and y-component is 5 N.


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NUMERICAL NO: 4.4

• A force of 100 N is applied perpendicularly on a spanner at a distance of 10 cm from a nut. Find the torque produced by the force.


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NUMERICAL NO: 4.5

• A force is acting on a body making an angle of 30 degree with the horizontal. The horizontal component of the force is 20 N. Find the force.


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NUMERICAL NO: 4.6

• A steering of a car has a radius of 16 cm. Find the torque produced by a couple of 50 N.


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NUMERICAL NO: 4.7

• A picture frame is hanging by two vertical strings. The tension in the strings are 3.8 N and 4.4 N. Find the weight of the picture frame.


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NUMERICAL NO: 4.8

• Two blocks of masses 5 kg and 3 kg are suspended by the two strings as shown. Find the tension in each string.


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NUMERICAL NO: 4.9

• A nut has been tightened by a force of 200 N using 10 cm long spanner. What length of spanner is required to loosen the same nut with 150 N force?
  


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NUMERICAL NO: 4.10

• A block of mass 10 kg is suspended at a distance of 20 cm from the centre of a uniform bar 1 m long. What force is required to balance it at its centre of gravity by applying the force at the other end of the bar?


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