## Workshop Calculation and Science

#### 2nd Year

#### Module 2: Center of Gravity

1: Which affects the centre of gravity of the object?

A : Weight

B : Mass

C : Density

D : Shape

2: What is the name of the point at which all the weight of the body concentrated?

A : Initial point

B : Centre of gravity

C : Centroid

D : Central point

3: Where the centre of gravity of a circle lies?

A : At its centre

B : Any where on its radius

C : Any where on its circumference

D : Any where on its diameter

4: What is the centre of gravity of a right circular cone from its base?

A : h/2

B : h/3

C : h/4

D : h/5

5: What is the centre of gravity of a rectangular body?

A : Longer side of rectangle

B : Shorter side of rectangle

C : At the point of intersection of its diagonals

D : At the corners

6: What is the centre of gravity of a solid hemisphere from its base?

A : 4r/5

B : 3r/8

C : 3r/4

D : r/2

7: What is the centre of gravity of a sphere?

A : At the centre

B : On the circumference

C : At the diameter

D : At the radius

8: Which state of equilibriumʹs example is A cone resting on its tip?

A : Stable

B : Neutral

C : Unstable

D : Horizontal

9: Which one of the following geometrical shapeʹs centre of gravity lies from its base is 1/3 of its height?

A : Square

B : Rhombus

C : Triangle

D : Cone

10: Which state of equilibriumʹs example is, A cone resting on its base?

A : Un-stable

B : Neutral

C : Stable

D : Bothe A and B

11: Where is the centre of gravity in ʹTʹ section?

A : 8.545 cm

B : 6.5 cm

C : 8.02 cm

D : 7.5 cm

12: What is the centre of gravity of the rectangle?

A : (6,3)

B : (6,6)

C : (6,1.5)

D : (1.5, 3)

13: What is the centre of gravity of the lamina?

A : 1.55 cm

B : 2.0 cm

C : 1.5 cm

D : 1.45 cm

14: What is the centre of gravity of the object?

A : 90.6 mm

B : 90.0 mm

C : 89.2 mm

D : 89.25 mm

15: What is the centre of gravity of the conical object?

A : 42.5 mm

B : 44.3 mm

C : 42.3 mm

D : 43.85 mm

16: What is the centre of gravity of the square?

A : (30, 20)

B : (20,30)

C : (30, 30)

D : (25, 30)

17: What is the centre of gravity of the cone base 10cm and height 50 cm?

A : 10.5 cm

B : 12.5 cm

C : 11.25 cm

D : 12.75 cm

18: What is the centre of gravity of a semi circle of diameter 12 cm?

A : 2.24 cm

B : 2.54 cm

C : 3.25 cm

D : 2.75 cm