Area of Irregular Shapes Using Graphical Method

Q. Find the ratio of the total area of the grid shown below to the approximate area covered by the pizza if the side of smallest square is 1 cm and each such square is congruent?

1. 
   $6:5$
2. 
   $4:3$
3. 
   $5:3$
4. 
   $7:3$

Q.

Arun needed to measure the area of a cardboard required to create his craft project. The shape he needed is displayed in the figure below. Which of the following could be used by him to determine the approximate area of this flower shaped figure?

1. Sheet of plain paper

2. Sand paper

3. Graph paper

4. Thread

Q. What is the area of a rhombus with diagonals 7 cm and 12 cm?

1. 84 sq. cm
2. 42 sq. cm
3. 21 sq. cm
4. 32 sq. cm

Q. Find the area of the quadrilateral PQRS.

1. 690 sq. m
2. 710 sq. m
3. 890 sq. m
4. 970 sq. m

Q. The side of a rhombus is 25 m and length of one of its diagonals is 48 m. The area of the rhombus is ____

1. 168 sq. m
2. 336 sq. m
3. 600 sq. m
4. 672 sq. m

Q. Consider the situation as shown in the figure. A constant force acting on the lower block produces an acceleration of $4{\text{m/s}}^2.$ The two blocks always move together. Find the work done by static friction on the upper block during displacement $2\text{m}$ of the system.

1. $16\text{J}$
2. Zero
3. $8\text{J}$
4. $10\text{J}$

Q. The total work done by static friction on a rigid body system has to be zero

1. False
2. True

Q. Consider the situation as shown in the figure. A constant force acting on the lower block produces an acceleration of $4{\text{m/s}}^2.$ The two blocks always move together. Find the work done by static friction on the upper block during displacement $2\text{m}$ of the system.

1. Zero
2. $16\text{J}$
3. $10\text{J}$
4. $8\text{J}$

Q.
The applied force F is enough to move, both block A and B together.The frictional force between A nad B does ________ work on A and _________ work on B.

1. negative, positive
2. positive, negative
3. negative, negative
4. positive, positive

Q. In a figure shown below, the work done by force of friction on the block is

1. Zero
2. cannot be determined
3. Negative
4. Positive