Question 1
A Vernier calliper was used to measure the diameter of a ball bearing. Given that its diameter is 2.36 cm, draw a Vernier calliper scale showing this reading.
Answer
Question 2
xm³ of a substance which has a density of 0.8/gcm³ is mixed with 1000cm³ of sea water of density 1020kg/m³. The density of the mixture is 960kg/m³. Determine the value of x.
Answer
Question 3
When building a house using bricks a damp course is laid just above the brick foundation. Explain why the damp course is necessary.
Answer
- To prevent rising of water up the walls through capillary action
Question 4
A sprig whose spring constant is 25N/m extends when supporting a certain load. It’s length increases from 0.1m to 0.2m. Determine the work done in stretching the spring
Answer
Question 5
Figure 1 below shows a trolley moving on a circular rail with a vertical plane, given that the mass of the trolley is 250g and the radius of the rail is 1.6m.
Determine the force exerted on the rail at point Z if the velocity of the trolley at this point is 4m/s.
Answer
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