Question 1
The figure below shows a micrometer screw gauge. What is the reading shown on the figure
Find the diameter of the metal rod
Answer
Question 2
State pressure law
Answer
State pressure law state that the pressure of a fixed mass of a gas is directly proportional to it’s absolute temperature provided volume is kept constant.
Question 3
State two factors that affect stability of a body
Answer
i) Position of the C.O.G.
ii) Base area of support
ii) Base area of support
Question 4
The diagram below shows a uniform wooden plank of length 4m and weight 10N. The plank is held at equilibrium by a weight of 40N placed at one end as shown below.
Determine the distance d.
Answer
Clock wise moment = anticlockwise moment
40 x d = 10 (2 - d)
40d = 20 - 10d
40d + 10d = 20
d = 20 ⁄ 50
= 0.4m
40 x d = 10 (2 - d)
40d = 20 - 10d
40d + 10d = 20
d = 20 ⁄ 50
= 0.4m
Question 5
Figure below shows a non-viscous fluid that is not compressible moving through a pipe of varied cross-sectional area
If the area of the narrow region is 0.05m2, calculate diameter of the wider region
Answer
A1V1 = A2V2
A1 x 0.1 = 2.2m/s x 0.05
= 1.1m2
A1 x 0.1 = 2.2m/s x 0.05
= 1.1m2