I really just need to see this problem worked out.. I can\'t grasp it. Thanks! F
ID: 1695008 • Letter: I
Question
I really just need to see this problem worked out.. I can't grasp it. Thanks!Find the Coefficient of kinetic friction between a 5.3-kg block and the horizontal surface on which it rests if a spring with an 98-N/m spring constant must be stretched by 2.8 cm to pull the block with constant velocity. Assum the spring pulls in a direction of 18° above the horizontal. I really just need to see this problem worked out.. I can't grasp it. Thanks!
Find the Coefficient of kinetic friction between a 5.3-kg block and the horizontal surface on which it rests if a spring with an 98-N/m spring constant must be stretched by 2.8 cm to pull the block with constant velocity. Assum the spring pulls in a direction of 18° above the horizontal.
Explanation / Answer
Frictional force should bebalanced by the component of the spring force along thehorizonatal µk m g = kx cos? µk = kx cos? / m g =98 x 0.028 x cos 18 / (5.3 x 9.8) = 0.0502