UI Physics 2014/2015 Past Questions

A ball is thrown up into the air. At the highest point of its trajectory the ball:

A ball of mass 200 g moving with a velocity of 8 m/s collides and sticks with another ball of mass 300 g moving in the same direction with velocity 4 m/s. What is the common velocity of the balls after the collision?

A boy holds the end of a rubber cord from which hangs a solid metal ball, if the boy whirls the ball in a horizontal circle, keeping his hand still. If the rubber cord breaks when the ball is at a point on the circle, in what direction will the ball move?

A force of 20 N applied parallel to the surface of horizontal table is just sufficient to make a block of mass 4 kg set for motion. Find the acceleration when the force is doubled.

A man walks 1 km due east and then 1 km due north. His displacement is

A motor car moves with a velocity of 20ms^-1 on a rough horizontal road and covers a displacement of 50 m. Find the coefficient of dynamic friction between the tyre and the ground (g = 10ms^-2)

A physics student standing on the edge of a cliff throws a stone vertically downward with an initial speed of 10.0 m/s. The instant before the stone hits the ground below, it is traveling at a speed of 30.0 m/s. If the physics student were to throw the rock horizontally outward from the cliff instead, with the same initial speed of 10.0 m/s, what is the magnitude of the velocity of the stone just before it hits the ground?

A quantity is defined as the product of cross-sectional area and change in momentum per unit length. Which of the following is its SI unit?

A rectangular concrete block 40 cm x 30 cm x 60 cm of mass 10 kg rests on a horizontal flat surface. What is the minimum pressure it can possibly exert on the surface?

A simple hydrometer consists of uniform cylinder suitably weighted to float upright in most common liquids. It is graduated to read the relative density of a liquid directly. Which of the following is NOT correct?

A stone which is dropped into a dry well hits the bottom in 2.2s. How deep is the well? (Take g = 10m/s)

A woman whose mass is 70 kg sits 2.4 m from the fulcrum of a seesaw. At what distance from the fulcrum should a 60 kg man sit to balance the seesaw?

An air bubble trapped at a depth in a liquid rises to the surface. Which of the following is true about its mass and density as it rises?

Complete the following sentence: The operation of a hydraulic jack is an application of

Complete the following statement: Today. the standard meter is defined in terms of

Convert 30 metre per second to centimeter per minute

During a football match, player A kicks the ball 40 m, 30° E of S to player B who instantly kicks it 30 m, 60° E of N. What is the magnitude of the resultant displacement of the ball?

How much work is done against gravity in sliding a 500g object through 2m up a smooth plane that is inclined at 30° to the horizontal? (g = 9.8ms^-2)

If a small body of mass m is moving with angular velocity co in a circle of radius r, what is its kinetic energy?

In free fall, two balls of masses 20kg and 10kg were dropped from a height. If the ball with the smaller mass reached the ground after 4s, what is the difference between the time the two balls reach the ground?

In what distance can a 1,500 kg automobile be stopped if the brake is applied when the speed is 20 m/s and the coefficient of sliding friction is 0.7 between the tyres and the ground?

The highest point of a simple pendulum bob is 5cm vertically above the lowest point as it swings to and fro between the two extreme ends. At what velocity does it swing past the lowest point (equilibrium point) where the string is vertical? (take g = 10 m/s^2)

Three vectors A, B, and C add together to yield zero: A + B + C = 0. The vectors A and C point in opposite directions and their magnitudes are related by the expression: A = 2C. Which one of the following conclusions is correct?

Which of the following could be measured in the same units as force?

Which of the following does not affect the pressure at a point beneath the surface of a liquid?