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Class 9 Olympiad Science Mock Test 3
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Class 9 Olympiad Science Mock Test 3
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25 Questions

1. Which of the following statements about the ER is false?
2. A pump installed on ground takes 15 minutes to fill a water tank of 30 m3 volume placed at a height of 50 m. If the efficiency of pump is 30%, the power consumed by the pump will be (Take density of water = 1000 kg/m3)
3. A liquid exerts a pressure of 100,999 Pa on an object when it is 73.5 cm below the liquid surface. What is the density of the liquid? (Take g = 10 m s–2)
4. What does the area of an 'acceleration displacement' graph represent?
5. What should be the angle between the force and displacement for maximum work?
6. The size of a colloidal particle is
7. If it is safe to jump from a height of 3 m on the earth, then what would be the safe height of drop on a planet where the value of 'g' is 1.96 ms–2?
8. What kind of pollution is being caused if a factory releases waste products into a nearby stream?
9. What do you infer, if s – t graphs of two cyclists moving along a straight line, meet at a point?
10. An astronaut of mass 80 kg jumped out of the rocket after it had landed on Jupiter. The astronaut took 0.4 s to drop for 2 m. What was the weight of the astronaut on Jupiter? (Take g = 25 m s–2
11. Which group has these characteristics? l Primi ve mul cellular organisms l Grow in moist places l Reproduce through spores l Obtain their food from dead and decaying organic matter
12. In which of the following applications is work not done?
13. What would happen if 'nucleus' is removed from the cell?
14. Frozen orange juice is reconstituted by adding water to it. What kind of change is described?
15. Calculate the kinetic energy of a body of mass 10 kg moving with a velocity 2 m s–1.
16. Who proposed five kingdom classification?
17. If no force acts on a body, then what will happen to it?
18. A race car accelerates uniformly from 18.5 m s-1 to 46.1 m s-1 in 2.47 seconds. What is the acceleration of the car?
19. A body looses half of its velocity while penetrating 3 cm into a wooden block, then how much will it penetrate more before coming to rest?
20. A force of 60 N acts on a body which moves it through a distance of 4 m on a horizontal surface. What is the work done, if the direction of force is at an angle of 60o to the horizontal surface?
21. What is the S.I. unit of temperature?
22. How many free surfaces exist in the case of solids?
23. The impact of balanced forces on an initially stationary object enables it to remain/move with/move in the direction
24. What is the primary cause for the tidal waves on the sea?
25. Which of the following is not a way of reducing the impulsive force?

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