# 12. QCA block of mass 3.00 kg is pushed up against a wall by aforce P that makes an angle of 0 50.0° with the horizontalas shown in Figure P5.12. The coeffi-cient of static fric tion between the blockand the wall is 0.250. (a) Determine thepossible values for the magnitude of Pthat allow the block to remain station-ary. (b) Describe what happens if |Phas a larger value and what happens if itis smaller. (c) Repeat parts (a) and (b),assuming the force makes an angle of0 13.0° with the horizontal.Figure P5.12

Question
3 views help_outlineImage Transcriptionclose12. QCA block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of 0 50.0° with the horizontal as shown in Figure P5.12. The coeffi- cient of static fric tion between the block and the wall is 0.250. (a) Determine the possible values for the magnitude of P that allow the block to remain station- ary. (b) Describe what happens if |P has a larger value and what happens if it is smaller. (c) Repeat parts (a) and (b), assuming the force makes an angle of 0 13.0° with the horizontal. Figure P5.12 fullscreen
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Step 1

(a)

Write the equilibrium condition for the vertical direction of force.

Write the equilibrium condition for the horizontal direction of force.

The force due to friction is,

Step 2

Substitute equation (II) in equation (I), to find maximum force exerted on the block.

Step 3

Substitute the values,

Similarly the minimum force exerted...

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