IGCSE Physics Quiz - Vector Addition at Right Angles

Question 1

Two vectors act at right angles: 3 N east and 4 N north. The resultant force is:

Accepted Answer

5 N

Question 2

The graphical method for combining two perpendicular vectors is:

Accepted Answer

Parallelogram rule

Question 3

A car travels 6 m/s north and 8 m/s east. Its resultant velocity is:

Accepted Answer

10 m/s

Question 4

If two forces, 5 N and 12 N, act at right angles, the resultant force is:

Accepted Answer

13 N

Question 5

Which formula is used to calculate the magnitude of the resultant of two vectors at right angles?

Accepted Answer

R = √(A² + B²)

Question 6

A boat moves 4 m/s across a river flowing 3 m/s. What is the boat's resultant speed?

Accepted Answer

5 m/s

Question 7

Two perpendicular velocities of 9 m/s and 12 m/s combine. The resultant is:

Accepted Answer

15 m/s

Question 8

The direction (angle) of the resultant can be found using:

Accepted Answer

Tan⁻¹(opposite/adjacent)

Question 9

What is the resultant of two forces 10 N west and 10 N north?

Accepted Answer

14.1 N

Question 10

Which statement is true for vectors at right angles?

Accepted Answer

Use trigonometry

Question 11

A plane flies 100 km/h north and 75 km/h east due to wind. Resultant velocity?

Accepted Answer

125 km/h

Question 12

Two velocities of 7 m/s and 24 m/s act at right angles. Find resultant.

Accepted Answer

25 m/s

Question 13

A person walks 6 km east and 8 km north. What is displacement?

Accepted Answer

10 km

Question 14

What shape is formed when adding two vectors at right angles graphically?

Accepted Answer

Parallelogram (right-angle triangle)

Question 15

Two equal forces act at right angles. Resultant is:

Accepted Answer

√2 × one force

Quiz IGCSE Physics – 1 Motion, forces, and energy – 1.1 Physical quantities and measurement techniques – 7 Determine, by calculation or graphically, the resultant of two vectors at right angles, limited to forces or velocities only