A box of weight 135 N is attached to the end of a dangling spring, stretching th

Physics
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10. A box of weight 135 N is attached to the end of a dangling spring, stretching the spring by 21.0 cm. What is the weight of an object that would stretch the spring by 69.6 cm?

11.A hockey puck is at rest on a flat surface. Then one end of the surface is lifted gradually, forming an inclined plane of increasing slope. If you know _____, you can accurately predict the angle at which the puck will start sliding. ( i got the answer choices) 

May 18th, 2015


69.6*135/21=447.42N

30..................................................................................................................

May 18th, 2015

the answer choices for 11 are :

a. the coefficient of static friction between the puck and surface

b. the mass of the puck

c. the surface area of the puck that meets the surface

d. the coefficient of kinetic friction between the puck and surface


PLEASE ANSWER CORRECTLY I NEED TO GET THIS QUESTIONS RIGHT.


May 18th, 2015

d..............................................................................................................................................................................

May 18th, 2015

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