Question

YOUTUBE M Gmail Grammarly Credit and Debt Qu. 3) Home - Roblox For the question that ends in: "what is the coefficient of kinetic friction between the crate and the floor put your answer in to 3 (THREE) decimal placestu For example 0.12 is not correct. Just enter the STATIC FRICTIONAL FORCE © Description 10. 1/4 points Previous Answers A Girl is pushing on a 45 kg dresser with 300 N of force. The dresser has a coefficient of static friction of 0.83 and a coefficient of kinetic friction of 0.55. Does the dresser move. yes .no What quantitative evidence can you give to prove that this? This answer has not been graded yet How much is the force of friction on the dresser? How much will the friction be if her brother puts a 15 kg dictionary on top of the dresses? Submit Answer

Answer 1

a)
Frictional force, Ff = _{$\mu$ s} * M * g
Where _{$\mu$ s} is the coefficient of static friction, M is the mass of the dresser.
Ff = 0.83 * 45 * 9.8
= 366.03 N
= 370 N (Answer in two significant figures)

The dresser does not move since the applied force, 300 N is less than the frictional force.

b)
Ff = 366.03 N
= 370 N (Answer in two significant figures)

c)
Ff = _{$\mu$ s} * (M + m) * g
Where M is the mass of the dresser and m is the mass of the dictionary.
Ff = 0.83 * (45 + 15) * 9.8
= 488.04 N
= 490 N (Answer in two significant figures)