If friction coefficient is µk , and mass of the block is m , which equation describes the value of friction force in the block? Block is sliding down Normal force Friction, fr from surface, n Weight, mg vertically down O Hk mg cos 0 O Hk mg O Hk mg sin 0 O mg cos 0 O mg sin 0

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Chapter1: Units, Trigonometry. And Vectors
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If friction coefficient is uk , and mass of the block is m , which equation
describes the value of friction force in the block?
Block is sliding down
Normal force
Friction, fr
from surface, n
Weight, mg
vertically
down
Mk mg cos 0
Hk mg
O Hk mg sin 0
mg cos 0
mg sin 0
Transcribed Image Text:If friction coefficient is uk , and mass of the block is m , which equation describes the value of friction force in the block? Block is sliding down Normal force Friction, fr from surface, n Weight, mg vertically down Mk mg cos 0 Hk mg O Hk mg sin 0 mg cos 0 mg sin 0
A box of mass 12 kg is pulled at a constant velocity with a cord that makes
the angle 32 degrees as shown in the sketch. If the coefficient of kinetic
friction between box and the surface at which it is sliding on is 0.21, and
tension in the string is 13 N, what is the value of kinetic friction force? (Note:
Use g = 10 m/s^2 and round answer to two significant figures. Learn about
sig. fig. in Section 1.3 of book or from provided handout )
velocity = constant
T
Transcribed Image Text:A box of mass 12 kg is pulled at a constant velocity with a cord that makes the angle 32 degrees as shown in the sketch. If the coefficient of kinetic friction between box and the surface at which it is sliding on is 0.21, and tension in the string is 13 N, what is the value of kinetic friction force? (Note: Use g = 10 m/s^2 and round answer to two significant figures. Learn about sig. fig. in Section 1.3 of book or from provided handout ) velocity = constant T
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