Very Short Question and Answers - Intro

Yes, an object can have moved through a distance and still have zero displacement. For example, if an object moves from point O to A and then back to O, the total distance travelled is the sum of the distances OA and AO, but the displacement is zero because the final position coincides with the initial position.

The farmer will complete a full circuit (40 m) of the square in 40 seconds. In 140 seconds (2 minutes 20 seconds), he will have completed 3 full circuits (120 seconds) and will be at the same starting position with a displacement of 0 m.

Neither (a) nor (b) is true. Displacement can be zero (if the object returns to its original position) and its magnitude can be less than or equal to the distance travelled.

Distance is the total path length covered by the object regardless of direction, while displacement is the shortest distance from the initial to the final position with a specified direction.

Uniform motion occurs when an object travels equal distances in equal intervals of time.

Non-uniform motion occurs when an object covers unequal distances in equal intervals of time.

No, the magnitude of displacement cannot be greater than the distance travelled. Displacement is a straight line measurement, while distance involves the actual path taken.

A

We infer motion indirectly when observing the effects of air movement, such as dust or leaves moving due to wind, even though we cannot see the air itself.

The origin refers to a specified starting point from which an object's position is measured.

Distance covered by an object is the actual path length traveled by it, whereas path length doesn't account for direction.

Yes, if an object doesn't move from its original position, both distance and displacement are zero.

Displacement is calculated as the final position minus the initial position, often expressed as Δx = x_final - x_initial.

The displacement is zero because the starting and ending positions are the same.

This type of motion is described as uniform circular motion.

Controlled motion, like in machinery, serves beneficial purposes (e.g., hydro-electric power), while erratic motion can pose danger and challenges (e.g., natural disasters).

The motion of the Earth is difficult to perceive directly because it occurs at a consistent speed and is superimposed on various forms of motion, and we experience everything else as moving relative to us.

We can observe air motion by noticing the movement of dust, leaves, or branches during windy conditions.

Understanding different types of motion is important as it helps predict and control phenomena, ensuring safety and efficiency in daily life and technology.

An example of uniform motion in daily life is a car moving at a constant speed on a straight highway without changing its speed or direction.