The slope of a linear distance-times graph represents

• A. acceleration
• B. displacement
• C. speed
• D. velocity

A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (The speed of sound in air is 330ms^-1)

• A. 600m
• B. 400m
• C. 330m
• D. 328m

Two forces, whose resultant is 100N are perpendicular to each other. If one of them makes an angle of 60o with the resultant, calculate the magnitude. (Sin 60o = 0.8660, Cos 60o = 0.500)

• A. 200.0N
• B. 173.2N
• C. 115.5N
• D. 50.0N

The diagram below represents a transverse travelling wave. Which two points are 180° out of phase?

• A. A and E
• B. B and D
• C. C and F
• D. D and H

The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?

• A. 55.3^oC
• B. 23.3^oC
• C. 49.0^oC
• D. 16.43^oC

A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

• A. 680J
• B. 400J
• C. 200J
• D. 100J

If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys

• A) Graham's Law
• B) Boyle's Law
• C) Pressure law
• D) Charles Law

A body is dropped from a certain height above the ground level, falls with uniform

• A. speed
• B. velocity
• C. acceleration
• D. retardation

The eye controls the amount of light reaching the retina by adjusting the

• A. cornea
• B. iris
• C. retina
• D. optic nerve

Which of the following are contact forces? I. Force of tension II. Force of fiction, III. Magnetic force III Force of reaction.

• A. I,II and III only
• B. I, II and IV only
• C. I, III and IV only
• D. II, III and IV only