Tension

Step 1: Identify the Forces Acting on the Pendulum Bob The bob of the pendulum experiences: 1. The gravitational force acting downward: 2. The centripetal force due to circular motion of the bus: These forces result in a net force along the string, which causes an elongation in the wire.

Step 2: Find the Resultant Tension in the Wire The net tension in the wire is given by:

Step 3: Apply Hooke’s Law for Elongation Using the formula for elongation in a wire: Substituting : Multiplying by : Thus, the elongation in the wire is:

Step 1: Applying Bernoulli’s Theorem According to Bernoulli’s principle, the pressure difference between the upper and lower surfaces of the wing is given by: where: - kg/m³ (density of air), - m/s, - m/s.

Step 2: Calculating the Lift Force The lift force is given by:

Step 3: Comparing with the Weight of the Aeroplane The weight of the aeroplane: Since , the lift force is greater than the weight, meaning the aeroplane will gain altitude. Thus, the correct answer is: