Q1. (a) A crane as shown in the Figure Q1 is used to lift the bricks via a cable X which is made of alloy. Cable X has modulus of elasticity, E = 212 GPa and tensile strength,
Ots = 610 MPa and diameter of 10 mm. Cable X also has the design capacity with
the maximum allowable elongation is 0.02% which is also known as yield strain.
For each of the brick weight of 1.45 kg, calculate maximum number of bricks
allowed to be lifted to avoid exceeding the design capacity. Given the length of the
cable is 10 m. Provide you answer in 4 decimal points.
(9 marks)
Cable X
05
O
Figure Q1

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

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