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Punjab 9th Class Physics Model Paper 4 MCQs Test Online

Question 1 of 36

Physics

1. A pencil lying horizontally is the example of:

1.unstable equilibrium

2.natural equilibrium

3.stable equilibrium

4.equilibrium

Question 1 of 36

Question 2 of 36

2. Formula for the direction of resultant force with the help of rectangular components is:

1.θ = sin⁻¹Fy/Fx

2.θ = tan⁻¹ Fy/Fz

3.θ = cos⁻¹Fy/Fx

4.θ = tan⁻¹ Fy/Fx

Question 2 of 36

Question 3 of 36

3. In SI, unit of torque is:

1.Nm

2.Nm⁻¹

3.Ns

4.Nm²

Question 3 of 36

Question 4 of 36

4. First condition of equilibrium is:

1.ΣF = 0

2.All of these

3.Σt = 0

4.Σs = 3

Question 4 of 36

Question 5 of 36

5. A body is neutral equilibrium when its center of gravity:

1.is at its highest position

2.is situated at its bottom

3.keeps its height if displaced

4.is at the lowest position

Question 5 of 36

Question 6 of 36

6. In a right angled triangle, length of a base is 4cm and its hypotenuse is 5cm. The length of a perpendicular is:

1.1 cm

2.20 cm

3.3 cm

4.9 cm

Question 6 of 36

Question 7 of 36

7. A body is in equilibrium when is:

1.speed and acceleration are uniform

2.acceleration is uniform

3.speed is uniform

4.acceleration is zero

Question 7 of 36

Question 8 of 36

8. Two equal but unlike parallel forces having different line of action produce:

1.a torque

2.equilibrium

3.neutral equilibrium

4.a couple

Question 8 of 36

Question 9 of 36

9. According to 2^nd condition of equilibrium is:

1.angular acceleration

2.sum of forces

3.rotational force

4.linear acceleration

Question 9 of 36

Question 10 of 36

10. The perpendicular distance between the axis of rotation and the line of action of force is called:

1.momentum

2.moment arm

3.work

4.torque

Question 10 of 36

Question 11 of 36

11. States of equilibrium are:

1.3

2.2

3.4

4.1

Question 11 of 36

Question 12 of 36

12. In a tight angled triangle, length of a base is 4 cm and perpendicular is 3 cm. Then its tan θ is equal to:

1.0.6

2.1

3.0.75

4.0.8

Question 12 of 36

Question 13 of 36

13. The number of perpendicular components of a vector are:

1.3

2.1

3.2

4.4

Question 13 of 36

Question 14 of 36

14. An example of neutral equilibrium is:

1.block

2.football

3.book on a table

4.pencil at its tip

Question 14 of 36

Question 15 of 36

15. tan 45° is equal to:

1.1.732

2.0.5

3.0.577

4.1

Question 15 of 36

Question 16 of 36

16. A couple is formed by:

1.two like parallel forces

2.two equal and opposite forces not is the same line

3.two equal and opposite forces in the same line

4.two forces perpendicular to each other

Question 16 of 36

Question 17 of 36

17. The turning effect of a force is called:

1.pressure

2.momentum

3.work

4.torque

Question 17 of 36

Question 18 of 36

18. The center of gravity of a uniform __________ sheet is the point of intersection of its diagonals.

1.solid cylinder

2.circular ring

3.triangular

4.square

Question 18 of 36

Question 19 of 36

19. Point of intersection of medians is the center of gravity if a uniform:

1.triangular sheet

2.solid cylinder

3.rod

4.circular ring

Question 19 of 36

Question 20 of 36

20. The conditions of equilibrium are:

1.4

2.2

3.1

4.3

Question 20 of 36

Question 21 of 36

21. Complete the equation: θ = __________ Fy/Fx.

1.cos⁻¹

2.tan⁻¹

3.tan

4.sin⁻¹

Question 21 of 36

Question 22 of 36

22. Resultant force F is equal to:

1.F = √(Fx² + Fy²)

2.F = Fx + Fy

3.F = √(Fx + Fy)

4.F = Fx² + Fy²

Question 22 of 36

Question 23 of 36

23. The number of perpendicular components of a force are:

1.1

2.2

3.3

4.4

Question 23 of 36

Question 24 of 36

24. cos θ is equal to:

1. (Perpendicular )/Base

2. (Base )/( Perpendicular)

3. (Base )/(Hypotenuse )

4. (Perpendicular )/(Hypotenuse )

Question 24 of 36

Question 25 of 36

25. If F_y = 4N and F_x = 3N, what is the magnitude of a resultant force?

1.7N

2.5N

3.10N

4.12N

Question 25 of 36

Question 26 of 36

26. A force of 10 N makes an angle of 90° with x-axis. Its horizontal component is:

1.Zero

2.10 N

3.5 N

4.Maximum

Question 26 of 36

Question 27 of 36

27. A force ‘F’ acting along x-axis, Its y components is:

1.1

2.2F

3.0

4.F

Question 27 of 36

Question 28 of 36

28. The center of gravity of a uniform solid cylinder is at:

1.middle point on its axis

2.center of the cylinder

3.the point of intersection of medians

4.center of a plate

Question 28 of 36

Question 29 of 36

29. The number if vectors that can be added by head to tail rule is:

1.4

2.1

3.any number

4.2

Question 29 of 36

Question 30 of 36

30. The center of gravity of an irregular shaped body can be found with the help of a:

1.meter rod

2.plum line

3. wedge

4.screw gauge

Question 30 of 36

Question 31 of 36

31. Sin 45° = cos 45° =

1.1.732

2.0.886

3.Undefined

4.0.707

Question 31 of 36

Question 32 of 36

32. Center of gravity of a sphere is at:

1.center of a sphere

2.outside of a sphere

3.none of these

4.radius of a sphere

Question 32 of 36

Question 33 of 36

33. Racing cars are made stable by:

1.decreasing their mass

2.lowering their center of gravity

3.decreasing their width

4.increasing their speed

Question 33 of 36

Question 34 of 36

34. The number of perpendicular components of a vector are:

1.4

2.2

3.3

4.1

Question 34 of 36

Question 35 of 36

35. The center of gravity of a triangle is at:

1.center of axis

2.center

3.point of intersection of medians

4.point of intersection of diagonals

Question 35 of 36

Question 36 of 36

36. A force of 10 N is making an angle of 30° with the horizontal. Its horizontal component will be:

1.4 N

2.5 N

3.8.7 N

4.7 N

Question 36 of 36

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Test By Topics	9th Class Physics

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