22, A stationury object of mass 4kg is set in metio hy a net force of SON. If the object uttains a speed of 5ms' in time t, calculate the value of t. A 0.20 B 0.40 C.0.63 D. 0.80 E 0.56s 23. Newton's second law of motion states that A the force, on a body is inversely proportional to its mus B when two or more bodies act upon one janother, their totul momentum remains constunt when extemal forces are acting on the body. C the time rate of change of linear momentum of a hody is proportionul to the impressed force and takes place in the dimction in which the force acts. D. the force acting on a body in motion s proportional to its kinetic energy. E the force acting on two bodies nai in contact is propartional to their masses und inversely to distance of separation 24. A net force of magnitsde .6N acts on a body of mass 40g, initiully at re. Calculate the magnitude of the resulting acceleration. A 90ms A 60ms C 30m D. 1Sms E 27ms 25, An inelastic collision takes place between balls of known masses Just before collision, ne of the halls is moving with a velocity while the other is stutionury. Which of the following physical quantities can he determined from the information given A Speed of ach of the hulls after oollision R. kinetic energy of each of the halls after collision C total momentum of the two balls after collision D D mutual forces exerted by the balls E the shape of the balls 26. The tendency of a boy to remain at rest when a force is applied to it is called C inertia A impulse R monsentum D. friction E weight 27, Which of the following explains the concuve meniscus of water in a gluss tuhe? A the adhesion between water and glass is greater than the colhesion between water molecules n the cohesion hetween water molecules is greuter thum the adhesion berween glass and water C the molecules of water aear the glass are moving faster than the molecules in other parts D the weight of the water pulls the central part of the surface down. E th guls is ut a different temperature than the water dse to its conductivity 28, Which of the following will not lower the surface tension of water? A Detergent calcium carbonate R Methylated spirit C. Soap D. Grease E 29. The adour of leaking gas is perceived at a distance fram the source. This is possible by the process of A sublimation B. diffusion C. osnosis D evaporationE regelation 30, Palm oil flows out mate easily after it has heen heated hecause the A molecules are given potential energy during the heuting B, friction between uil layers is reduced C. oil molecules focce each other out n adhesion between the ail molecules and those of the bottle is increased E nil is less sticy 31. A man of mass 65kg carrying a loud of mass 25ky stands iaside a lift. If the lift moves upwards with an acceleration of Sms, calculate the magnitude of its teaction on the man. A 325N B 60ON C 90ON D 135ON E 200ON 32. A hurometer cun he used in determining the L height of a mountain IL Depth of a mine. IL Dew point Which of these ivire correct? A. 1. Il und Il B. II and II only DI and Il only Cl and Il only E none of the above