CSEC Physics Paper 2 May/June 2005 - Free CXC Past Paper with Answers

State the principle of conservation of energy.

Define the term 'potential energy'.

Give ONE example of a body possessing potential energy.

Define the term 'kinetic energy'.

Give ONE example of a body possessing kinetic energy.

At a football match between two college teams, the referee ordered a free kick. The ball of mass $1.5 \text{ kg}$ was placed at rest. The kick was about to be taken by an eager footballer.

What was the potential energy of the ball just before the kick was taken?

The footballer kicked the ball and it was caught by the opposing goalkeeper, $4 \text{ metres}$ above the ground. The ball was travelling at $10 \text{ m s}^{-1}$.

Calculate the potential energy of the ball just before it was caught.

Calculate the kinetic energy of the ball just before it was caught.

After the ball was caught, what was the kinetic energy converted into?

Define the 'heat capacity of a substance' and state its SI unit.

Name the THREE modes of heat transfer.

A well-insulated hot water tank is used to supply hot water to a residential dwelling house. The immersion heating element inside the tank has a power rating of $2200 \text{ W}$ and the tank contains $125 \text{ kg}$ of water at $28^\circ\text{C}$. Calculate

the heat energy supplied by the heating element in $2 \text{ hours}$

the heat energy supplied to the water, given that its temperature increases to $58^\circ\text{C}$

[specific heat capacity of water is $4200 \text{ J kg}^{-1} \text{ K}^{-1}$]

the heat capacity of the tank, assuming that the tank and the water reach the same final temperature of $58^\circ\text{C}$.

Explain what is meant by the term 'magnetic field'.

TWO bar magnets are close to each other so that their magnetic fields interact. Sketch the field pattern for the TWO arrangements shown below. (i) (ii)

In Figure 1 below the primary of the transformer is connected to a battery and a switch while the secondary is connected to a centre-zero galvanometer.

Describe what would be observed on the galvanometer when the switch is closed.

Explain your answer.

Describe what would be observed on the galvanometer if the switch is subsequently opened.

Deduce what would be observed on the galvanometer if the battery were replaced by a low frequency a.c. supply.

How would these observations be affected if the number of turns on the transformer secondary were significantly increased?

Identify the logic gates described in the first column of the table below and hence complete the table by writing in the names and logic symbols in the appropriate columns.

Figure 2 shows a logic circuit.

Examine the logic circuit shown in Figure 2 and complete the TRUTH TABLE below:

The logic circuit of Figure 2 is incorporated into the electrical system of a car as shown in Figure 3 below, and switches S1 and S2 are operated according to the table below.

Explain what happen if:

the DOOR is OPEN and the ENGINE is OFF.

the DOOR is OPEN and the ENGINE is ON.