U2 Videos FP 3.1.21

What is the initial velocity of the book as it begins to slide down the inclined plane?

• 0 m/s

• 0.78 m/s

• 2.05 m/s

• 14 m/s

When drawing a free body diagram for an object on an inclined plane, how is the force of gravity typically represented after being broken into components?

• As two components, one parallel and one perpendicular to the incline.

• As a single force acting straight down.

• As a single force acting perpendicular to the incline.

• As two components, both acting parallel to the incline.

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Which of the following equations correctly represents the coefficient of kinetic friction (μk) for an object sliding down an inclined plane, where 'a' is the acceleration parallel to the incline, 'g' is the acceleration due to gravity, and 'θ' is the incline angle?

• μk = (g sinθ + a) / (g cosθ)

• μk = (g cosθ + a) / (g sinθ)

• μk = (a - g sinθ) / (g cosθ)

• μk = (a - g cosθ) / (g sinθ)

What is the calculated coefficient of kinetic friction (μk) for the book sliding down the incline, given an incline angle of 14°, a displacement of 0.78 m in 2.05 seconds, and an initial velocity of 0 m/s? (Use g = 9.81 m/s² and round to two significant figures.)

• 0.29

• 0.21

• 0.27

• 0.37