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Physics Lab - Lesson 2
Newton's Laws

6. A `10`-`kg` box rests on the inclined plane shown below. a) Draw a free-body diagram of the box. b) Determine the friction force between the box and inclined plane.
6. A 10-kg box rests on the inclined plane shown below. a) Draw a free-body diagram of the box. b) Determine the friction force between the box and inclined plane.
Hint
`sumF = 0`
Answer
b) `f_s = 50\ N`
Show Steps
a)
b)
Given: `m = 10\ kg` `θ = 30°` Equation `sumF = 0` Solution: `sumF = f_s - mgsinθ = 0` `=>` `f_s = mgsinθ` `f_s = (m = 10\ kg)(10\ m//s^2)(sin30°)`
`f_s = 50\ N`