14. A spring scale is constructed so that each 1.0-kg increment is separated by

Physics
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14A spring scale is constructed so that each 1.0-kg increment is separated by 1.0 cm. What spring constant is necessary for the scale to be accurate?

15. You push against a steamer trunk with a force of 750 N at an angle of 25° with the horizontal . The trunk is on a flat floor and the coefficient of static friction between the trunk and floor is 0.77. What is the most massive trunk you will be able to move?

May 18th, 2015

14.k = 0.10/0.50 N/cm = 0.20 N/cm.

15.F = \mu _{s}N\] u is the coeff. of friction N is the normal force Take the force vector you are given and calculate the component that acts horizontally. That is your F. Then understand that N is just going to be equal to the weight of the trunk. You know weight is defined as m*g. 'g' is known, so you can solve for 'm'.

May 18th, 2015

14 wrong and 15 whats the answer? 

May 18th, 2015

hello! ur gonna answer or not? so i can withdraw it...

May 18th, 2015

14 is right

let me finish 15

May 18th, 2015

these are the answer choices for 14  please do not guess i need these questions answered correctly :)

a. 0.10 N/cm

b. 1.0 N/cm

c. 9.8 N/cm

d. 0.33 N/cm


May 18th, 2015
F = \mu _{s}N\]
750=m*g
750/10
m=75kgs


May 18th, 2015

question14

k = 9.8/1.0 N/cm = 0.20 N/cm. 

=9.8 N/cm

May 18th, 2015

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May 18th, 2015
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