.A motor of power 0.98KW drags a mass 100kg through 4m on a surface having coefficient of friction 0.3.Time of motion of that mass is A) 0.4s B) 0.8s C) 1.2s D) 1.6s
please answer it perfectly(The correct anser is so please type steps for it down there)
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please answer it perfectly(The correct anser is so please type steps for it down there)
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|________
p l e as e |
a nsw e r |
|plssssss| |
|plsssss | \/
Answers & Comments
Answer:
Given :
Power of motor , .
Mass of object , M = 100 kg .
Coefficient of friction , .
Initial velocity , u = 0 m/s .
To Find :
Time of that mass .
Solution :
Power is given by :
Now , frictional force F is given by :
........2
Here , a is acceleration .
Now , by equation of motion :
Putting all given values in above equation .
We get :
Putting all given values in equation 2 , we get :
Therefore , time of that mass is 0.626 s .
Hence , this is the required solution .