UNIT 2: I. Rectilinear Motion

Which of the following quantities is a vector?​ (a)  

• Displacement
• Speed
• Distance
• Acceleration

The rate at which an object changes its velocity is called:​ (a)  

• Acceleration
• Speed
• Displacement
• Distance

4. The area under a velocity-time graph represents:​

5. ​ ​ (a)   ​

• Displacement
• Distance
• Acceleration
• Speed

In rectilinear motion, which of the following statements is always true regarding the direction of velocity and displacement?

• a) They are always in the same direction.

• b) They are always in opposite directions.

• c) They are always perpendicular to each other.

• d) They are along the same line, but can be in the same or opposite directions.

In the equation s=ut+21​at2, what does 'u' represent?

• a) Final velocity

• b) Initial velocity

• c) Acceleration

• d) Displacement

Categorize the following as “Constant Velocity” or “Accelerated Motion”

Groups:

(a) CONSTANT VELOCITY

,

(b) ACCELERATED MOTION

• A falling object speeds up as it moves downward

• The velocity of a ball thrown upward decreases on the way up

• A car moves 20 m every second without changing pace

• An object’s displacement-time graph is a straight diagonal line

14. A stone is dropped from the top of a building. Its speed after 2 seconds is approximately (g = 9.8 m/s²):

• • a) 19.2 m/s

• • b) 19.4 m/s

• c) 19.6 m/s

• d) 19.8 m/s

18. You're simulating real-world motion. Which of the following demonstrates pure rectilinear motion?
    

• a) A car turning around a track

• b) A windmill rotating

• c) A drone flying loops

• d) A skateboard rolling down a straight ramp

A train moving at a constant velocity covers a distance of 120 km in 2 hours. Its speed is:

• a) 30 km/h

• b) 60 km/h

• c) 120 km/h

• d) 240 km/h