1. A) State the "principle of moment."
b) Describe two condition for a body to be at the state of equilibrium.
c) A uniform wooden beam, 4.8m long is supported at its left hand end, if the weght of the beam is 200N, determine the reactions at the support.
2. Define the following.
(i) Radian
(ii) Velocity
b) Convert the following units as per instruction given:
(i) 36km/h into m/s
(ii) 2400 rev/min into rad/s
c) Derive the equation which show the relationship between linear velocity, V and angular velocity
d) A wheel of diameter 540mm is rotating at 480rev/min, calculate the linear velocity of the point on the r/m of the wheel.
3. (a) Define the following terms
(i) Mechanical advantage
(ii) Efficiency of a machine.
(b) Explain why the efficiency of a practical machine does not reach 100%
(c) Draw a block and tackle system of a pulley with velocity ratio of 6.
d) When an effort of 400N is applied the above pulley system can raise the load of 1500N. Determine the
i) Mechanical advantage
(ii) Efficiency
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