*PHYSICS TRIAL _*

*_Objectives_*

*1* A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water.
A. 4N
B. 5N
C. 48N
D. 60 N

*2* Which of the following is the unit of work?
A. N
B. kg
C. W
D. J

*3* The tendency of a body to remain at rest or to continue its state of uniform motion is called...
A. resistance
B. friction
C. inertia
D. tension

*4* Which of the following type of motion is predominant in the molecules of a gas sealed in a tube?
A. Rectilinear
B. Random
C. Circular
D. Oscillatory

*5* Which of the following indicates a change of state of matter?
A. Cooling
B. Warming
C. Drying
D. Melting

*6* The slope of the straight line displacement time graph indicates...
A. distance traveled
B. uniform velocity
C. uniform acceleration
D. acceleration at instant

*7* A ball is thrown vertically upwards from the ground with an initial velocity of 50ms-¹. What is the total time spent by the ball in the air?
A. 2.5s
B. 5.0s
C. 10.0s
D. 15.0s

*8* Which of the ff affects the period of oscillation of a simple pendulum?
A. Length of the string
B. Angle of swing of the string
C. Mass of the bob
D. Amplitude of the oscillation

*9* The unit of impulse is
A. Js
B. Js-¹
C. Ns
D. Ns-¹

*10* A stone is tied to a string and whirled round. What type of motion does the system execute?
A. Rotational
B. Spin
C. Simple harmonic
D. *

*ESSAY PART*

*1* a) Explain with the aid of a diagram what is meant by the _moment of a force_ about a point

b) i) State the conditions of equilibrium for a number of coplaner-parallel forces.
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