BUK Physics 2010/2011 Past Questions

A car of mass 800kg attains a speed of 25m/s in 20seconds. The power developed in the engine is

A lead bullet of mass 0.05kg is fired with velocity of 200m/s into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after the impact is

A ball of mass 0.1kg is thrown vertically upwards with a speed of 10m/s from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is

Two bodies of masses in the ratio 3:1 They experience forces which impact to them accelerations in the ratio 2:9 respectively. Find the ratio the forces of the masses experience

A particle of mass 20kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rads^-2. If the radius of the blade is 0.2, the centripetal force is

The inner diameter of a small test tube can be measured accurately using a

A gas at a volume V_o in a container at pressure P_o is compressed to one fifth of its volume. What will be its pressure if it maintains its original temperature?

A piece of a substance of specific heat capacity 450JKg^-1X^-1 falls through a vertical distance of 20m from rest. Calculate the rise in the temperature of the substance on hitting the ground when all its energies are converted into heat

If the stress on a wire is 10⁷Nm^-2 and the wire is stretched from its original length of 10.00cm, to 10.5cm. The young modulus of the wire is

A solid weighs 1.00N in air, 6.0N when fully immersed in water and 7.0N when fully immersed in a certain liquid X. Calculate the relative density of the liquid.

i. A liquid boils when it's saturated vapour pressure is equal to the external pressure
ii. Dissolved substances in pure water lead to increase in boiling point.
iii. When the external pressure is increased, boiling point increases.
iv. Dissolved substances in pure water decreases the boiling point of a liquid.
Which of the following Statements are correct?

Where the temperature of a liquid is increased, its surface tension

When the brakes in a car are applied, the frictional force on the tyres is

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 180Hz?

A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is

If a sound wave goes from a cold region to a hot air region, its wavelength will

The inside portion of a part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a

The equation of a wave travelling along the positive X-direction is given by y=0.25 × 10^-3sin(500t-0.025x), determine the angular frequency of the wave motion

Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss.

Four cells each of emf 1.5v, and internal resistance of 4Ω are connected in parallel. What is the effective emf and internal resistance of the combination