## zainabrehman 4 years ago a mass of ikg is attached to a spring produce an extension of 0.1cm. its spring constant is 100N/m 10N/m 1000N/m 1N/m

1. mujtabazarrar

f=-kx f=kx k=f/x k=(1*10)/(0.1*10^-2)= 10,000 N/m but this choice is not availble

2. mujtabazarrar

IS it 1 kg?

3. zainabrehman

4. mujtabazarrar

From which book are you asking this question? and secondly which combination are you studying in F.Sc.

5. zainabrehman

first year book of fsc

6. mujtabazarrar

which page?

7. mujtabazarrar

are you premed or pre-engr?

8. zainabrehman

i m prepare entry test this question is book kips

9. zainabrehman

i m premed

10. mujtabazarrar

i get it .......you are on the chapter from oscillations?

11. zainabrehman

yes

12. mujtabazarrar

the mass is 1 kg..... g=10m/s^2......so the external force acting on the spring is 10 newton

13. mujtabazarrar

the extention in the string is 0.1cm=0.1*10^-2

14. mujtabazarrar

divide the first by the second what do you get in N/m?

15. mujtabazarrar

10/(0.1*10-2) = 10*100*10=10000 N/m definitely......unofficial entry test book not issued by testing authority can have lots of errors....

16. JohnLight

f=mg=kx 0.1cm=.001m 1kg*10m/s^2=k*0.001m 10N/.001m=10000N/m

17. JohnLight

The above options are incorrect because. 1kg*10m^s2=! 1000N/m*.001m or 100N/m *.001m and etc