Question

How much force is required to come in motion for solid weight 20 kg is placed on a solid surface if the coefficient of friction is 0.25

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

49 N

Explanation:

We are given that a solid of weight 20 kg is placed on a solid surface and coefficient of friction is 0.25

We have to find the amount of force required to come in motion for solid

In order to find  the value of force we are using formula of friction

We know that weight of solid ,$W =mg$

Normal reaction force  =$20\times 9.8=196 N$

Where $g=9.8 m/s^{-2}$

Now, friction force =$\mu mg$

Where $mu$=0.25

Welding strength =$0.25\times 196=49 N$

To move the object we have to break the welding.Hence, the minimum force required to move the object is 49 N.