CSEC Physics Paper 2 May/June 2025 - Free CXC Past Paper with Answers

Define the term 'gravitational potential energy'.

Figure 2 shows Keroi, a basketball player in the national league in St Vincent, going through his routine.

As Keroi dribbles the ball with either his right or left hand, energy conversion takes place. List the energy changes which take place through the following stages as he dribbles the ball. (i) When the ball leaves his hand and strikes the ground

While the ball is in contact with the ground

When the ball leaves the ground and rebounds to his hand

In a test to determine if a basketball with a mass of 1.1 kg is properly inflated, the basketball is dropped from a height of 1.5 m and rebounds to a height of 0.8 m.

Calculate the energy lost by the basketball.

Suggest TWO possible ways in which the energy was lost by the ball.

Draw and label a diagram of a simple transformer.

With the aid of your diagram, explain the operation of a simple transformer.

A local power station distributes power at 13.2 kV. This power is then converted to 220 V for domestic use.

Based on the scenario above, identify the key assumption made with respect to an ideal transformer.

State the equation for an ideal transformer.

Assuming the transformer is ideal, calculate its turns ratio.

If the current in the secondary coils is 5 A, calculate the current in the primary coils.

Define EACH of the following wave phenomena.

Wavelength

Amplitude

Diffraction

Two loudspeakers placed about one metre apart are simultaneously playing the same music. Sophia walks along the line from A to B, as shown in Figure 3.

Figure 3. Two loudspeakers and the path taken by Sophia walking by

(i) Describe what Sophia hears while walking along the line from A to B. (ii) Explain your answer in (b) (i).

Explain the concept of 'wave particle duality' of light, making use of the contributions of Newton and Young.

Define EACH of the following terms.

Velocity

Momentum

State the principle of conservation of linear momentum.

In a Twenty20 cricket match, a ball with a mass of $160 \text{ g}$ has a velocity of $25 \text{ ms}^{-1}$ off the pitch and is hit by a bat with a mass of $1.2 \text{ kg}$ moving in the opposite direction at $15 \text{ ms}^{-1}$.

(i) Calculate the momentum of the a) bat before collision b) ball before collision. (ii) After contact between the bat and the ball, the ball moves in the opposite direction at $20 \text{ ms}^{-1}$. Assuming the collision is completely elastic, calculate the a) momentum of the bat after the collision b) velocity of the bat after the collision.

Calculate the momentum of the a) bat before collision b) ball before collision.

After contact between the bat and the ball, the ball moves in the opposite direction at $20 \text{ ms}^{-1}$. Assuming the collision is completely elastic, calculate the a) momentum of the bat after the collision b) velocity of the bat after the collision.