UNIT 3:

Dynamics...
Numerical Problems...

Numerical No: 3.1,3.2,3.3,3.4,3.5,3.6,3.7,3.8,3.9,3.10

NUMERICAL NO: 3.1

• A force of 20 N moves a body with an acceleration of 2 ms^-2. What is mass?


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NUMERICAL NO: 3.2

• The weight of the body is 147 N. What is the mass? (Take the value of g as 10 ms^-2)


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NUMERICAL NO: 3.3

• How much force is needed to prevent a body of mass 10 kg from falling?


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NUMERICAL NO: 3.4

• Find the acceleration produced by a force of 100 N in a mass of 50 kg.


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NUMERICAL NO: 3.5

• A body has weight 20 N. How much force is required to move it vertically upwards with an acceleration of 2 ms^-2?

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NUMERICAL NO: 3.6

• Two masses 52 kg and 48 kg are attached to the end of a string that passes over a frictionless pulley. Find the tension in the string and acceleration in the bodies when both the masses are moving vertically.


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NUMERICAL NO: 3.7

• Two masses 26 kg and 24 kg are attached to the end of a string that passes over a frictionless pulley. 26 kg is lying over a smooth horizontal table. 24 kg mass is vertically downward. Find the tension in the string and the acceleration in the bodies.


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NUMERICAL NO: 3.8

• How much time is required to change 22 Ns momentum by a force of 20 N?


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NUMERICAL NO: 3.9

• How much the force of friction between a wooden block of mass 5 kg and the horizontal marble floor? The coefficient of friction between wood and the marble is 0.6.


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NUMERICAL NO: 3.10

• How much centripetal force is needed to make a body of mass 0.5 kg to move in a circle of radius 50 cm with a speed of 3 ms^-1?


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