TEST OF PRACTICAL KNOWLEDGE QUESTION You are provided with a wooden block to which a hook is fixed, a set of masses, spring balance, and other necessary mat...

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TEST OF PRACTICAL KNOWLEDGE QUESTION


You are provided with a wooden block to which a hook is fixed, a set of masses, spring balance, and other necessary materials. Using the diagram above as a guide, carry out the following instructions.

  1. Record the mass m\(_{0}\), indicated on the wooden block.
  2. Place the block on the table.
  3. Attach the spring balance to the hook.
  4. Pull the spring balance horizontally with a gradual increase in force until the block just starts to move Record the spring balance reading F.
  5. Repeat the procedure by placing in turn mass m=200, 400, 600, and 800g on top of the block. In each case, read and record the corresponding value of F.
  6. Evaluate M = m\(_{0}\) + m and R = \(\frac{m}{100}\) in each case
  7. Tabulate your readings.
  8. Plot a graph with F on the vertical axis and R on the horizontal axis
  9. Determine the slope, s, of the graph.
  10. State two precautions taken to ensure accurate results.

(b)i. Define coefficient of static friction. 

ii. A block of wood of mass 0.5 kg is pulled horizontally on a table by a force of 2.5 N. Calculate the coefficient of static friction between the two surfaces.(g = 10ms\(^{-2}\))

Equilibrium Of Forces
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