Q3 i) State Newton’s second law. [1] ii) A force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle ? = 15° to the horizontal. The positive direction of the x axis is up the plane. The coefficients of friction between block and plane are ?s = 0.50 and ?k = 0.34. In unit-vector notation, what is the frictional force on the block from the plane when P is (a) (-5 N) i?, (b) (-8 N) i?, and (c) (-15 N) i?? [3]

          Q3
i) State Newton’s second law. [1]
ii) A force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle ? = 15° to the horizontal. The positive direction of the x axis is up the plane. The coefficients of friction between block and plane are ?s = 0.50 and ?k = 0.34. In unit-vector notation, what is the frictional force on the block from the plane when P is (a) (-5 N) i?, (b) (-8 N) i?, and (c) (-15 N) i?? [3]

Q3
i) State Newton’s second law. [1]
ii) A force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle ? = 15° to the horizontal. The positive direction of the x axis is up the plane. The coefficients of friction between block and plane are ?s = 0.50 and ?k = 0.34. In unit-vector notation, what is the frictional force on the block from the plane when P is (a) (-5 N) i?, (b) (-8 N) i?, and (c) (-15 N) i?? [3]

Added by Jaime S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

02/08/2023

Step 1

Step 1: From the equation of motion, we can see that the block is experiencing a force of -5 N in the negative x-direction. Show more…

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Q3 i) State Newton’s second law. ii) A force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle θ = 15° to the horizontal. The positive direction of the x axis is up the plane. The coefficients of friction between block and plane are μs = 0.50 and μk = 0.34. In unit-vector notation, what is the frictional force on the block from the plane when P is (a) (-5 N) î, (b) (-8 N) î, and (c) (-15 N) î? [3]