# physics

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using the strap at an angle of 31° above the horizontal, a Grade 12 Physics student, tired from studying, is dragging his 15 kg school bag across the floor at a constant velocity.

(a) If the force of tension in the strap is 51 N, what is the normal force on the bag?
image

(b) What is the coefficient of kinetic friction between the bag and the floor?

• physics -

wouldn't it be weight minus the vertical component of the pulling force?

b) THe horizontal force=friction=mu*(mg-vertical force)=51cosTheta

• physics -

bgfgt

• physics -

vb

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