A bullet fired at an angle 60° with the vertical hits the levelled ground at distance of 200 m. Find the distance at which the bullet will hit the ground when fired at an angle of 30°(with same speed)
Both will have the same range since the angles θ and (90-θ) will result in the same range. For a given speed of projection there are two possible angles of projection to obtain the same range.
SCHEME OF EXAMINATION
There are three papers – papers 1,2,& 3. All the papers are compulsory.
Paper – 1 consists of 50 multiple choice questions carrying 50 marks and the paper is to be finished in 1 hour 15 minutes.
Paper – 2 consists of 2 sections carrying total 60 marks to be completed in 90 minutes. Section I comprises of 7 short-structured questions. Candidates can answer any five and score 15 marks. Section II comprises of five essay questions out of which the candidates can answer any three to get 45 marks.
Paper – 3 Practical test with three questions and the candidates are to answer any two in 2 hr 45 minutes.
DISTRIBUTION OF THE MAJOR TOPICS IN PHYSICS OVER THE THREE YEARS – NIGERIA
Concepts of Space, Time and Motion 1. Motion 2. Position, distance and displacement 3. Time 4. Speed and velocity 5. Rectilinear and derived units 6. Scalars and vectors 7. Equations of uniformity accelerated motion 8. Projectiles 9. Equilibrium of forces 10. Simple harmonic motion
Conservation principles 1. Work, energy and power 2. Heat energy 3. Electric charges 4. Linear momentum 5. Mechanical energy 6. Heat energy i. temperature and its measurement ii. heat energy measurement iii. gas laws
Waves 1. Production and propagation of waves 2. Types of waves 3. Properties of waves 4. Light waves 5. Sound waves 6. Application of light and sound waves i. light waves ii. sound waves 7. Electromagnetic waves
Fields 1. Production and description and property of a field 2. Gravitational field 3. Electric field 4. Magnetic field 5. Electromagnetic field 6. Simple A.C Circuit
Quanta 1. Particulate nature of matter 2. Plastic properties of solids 3. Crystal structure 4. Fluids at rest and in motion 5. Molecular theory of matter 6. Models of the action 7. The nucleus 8. Energy quantization 9. Wave – particle paradox
The window and door of house Are both left open a windy day. The door which opens inward tend to slum shut when it is slightly ajar,.explain
Riya Parekh asked.
This is a consequence of the difference in presure. When there if flow of air, the speed of air outside will be more and therefore the pressure immediately outside the door becomes less than that inside and therefore it gets shut.
If we have 3 simple pendulums of different material. One of them is dimagnetic one is paramagnetic and another one is of ferromagnetic material. What type of change in their periodic time they will show, if there masses are identical?
The Time period of a simple pendulum does not depend on the material of the bob
Why is it so that current through external resistance is maximum when total internal resistance of the circuit is equal to external resistance?
Please refer to the following