Distinguish between scalar and vector quantities. What is the main difference between them?

• Scalar quantities are always negative, while vector quantities are always positive.

• Scalar quantities have both magnitude and direction, while vector quantities have only magnitude.

• Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

• Scalar quantities can be measured in meters, while vector quantities cannot be measured.

Describe the difference between distance and displacement.

• Distance is the total path length traveled, while displacement is the straight-line distance from the starting point to the ending point in a specific direction.

• Distance and displacement are always equal for any journey.

• Displacement is always greater than distance traveled.

• Distance is measured in meters, while displacement is measured in seconds.

Define speed (v) as the distance (s) travelled divided by time taken (t). What is the formula for speed?

• v = t / s

• v = s / t

• v = s * t

• v = t - s

Explain the difference between average speed and instantaneous speed.

• Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed at a specific moment in time.

• Average speed is the speed at a specific moment in time, while instantaneous speed is the total distance traveled divided by the total time taken.

• Average speed and instantaneous speed are always the same for any journey.

• Average speed is calculated only for circular motion, while instantaneous speed is for straight-line motion.

If an object travels 100 meters in 20 seconds, what is its speed in m/s?

• 0.2 m/s

• 2 m/s

• 20 m/s

• 5 m/s

Convert 36 km/h to m/s. (Use the conversion: km/h ÷ 3.6 = m/s)

• 8 m/s

• 12 m/s

• 10 m/s

• 36 m/s

Define velocity (v) as the displacement (s) divided by time taken (t) with direction. What is the formula for velocity?

• v = s / t (with direction)

• v = t / s (with direction)

• v = s × t (with direction)

• v = s + t (with direction)

Describe the difference between speed and velocity.

• Speed is a scalar quantity (no direction), while velocity is a vector quantity (has direction).

• Speed and velocity are both vector quantities with direction.

• Speed is measured in meters, velocity in kilometers.

• Speed is always greater than velocity.

If a car travels 150 km north in 3 hours, what is its average velocity?

• 150 km/h north

• 50 km/h north

• 30 km/h north

• 45 km/h north

Show a logical method when doing calculations. Which of the following is NOT a recommended step?

• A) Draw diagram

• B) Guess the answer

• C) List data by symbols

• D) State formula