Grade 9 Physics. ICSE. Marks 50

Topics 

1. Measurements and Experimentation

2. Motion in one dimension

3. Laws of motion

4. Pressure in fluids and atmospheric pressure

5. Upthrust in fluids, Archimedes' 6. principle and floatation

7. Heat and Energy

8. Reflection of light

9. Propagation of sound waves

10. Current electricity

11. Magnetism

Question 1.   10 Marks

1.  What are the requirements  for selecting a  physical quantity?

2. A body starts to slide over a horizontal surface with an initial velocity of 0.5 ms-1. Due to friction, its velocity decreases at the rate of 0.05 ms-2. How much time will it take for the body to stop?

3.Differentiate between distance and displacement. 

Question 2. ( 10 Marks)

1. Distinguish between fundamental and derived units with examples. 

2.Distinguish between speed and velocity.

3.Classify the following amongst contact and non - contact forces: 

1. Frictional force 

2. Normal reaction force 

3. Force of tension in a string

 4. Gravitational force 

5.Electrostatic force

6.  Magnetic force

Question 3.

1.A car travels the first 30 km with a uniform speed of 60 km h¹ and the next 30 km with a uniform speed of 40 km h 1 Calculate: The total time of journey, and  The average speed of the car.

2. Why does a person fall when he jumps out from a moving train ?

3. What vertical height of water will exert a pressure of 333200 Pa? The density of water is 1000 kgmr³ and g = 9.8 ms-2.

Question 4

1. State three factors on which the pressure at a point in a liquid depends.

2. a. State the principle of floatation.

    b. The mass of a block made of certain material is 1.35 kg and its volume is 1.5 x 10-3 m³ 

1. Find the density of block. 

2. Will this block float or sink? Give reasons for your answer. 

3. State three differences between heat and temperature.

Question 5.

1. Draw a diagram to show the reflection of a ray of light using a plane mirror. In the diagram, label the incident ray, the reflected ray, the normal, the angle of incidence and the angle of reflection.

2. State three conditions necessary for hearing sound.

3. State three characteristics of resistances in the series circuit