question_answer

Explain the following: (A) When a carpet is beaten with a stick, dust comes out. (D) Athletes often fail to stop themselves before the line. (C) Some leaves may get detached from a tree if we vigorously shake its branch. (L) In oil tankers some space is left at the top while filling them.

Answer:

(A) When the carpet is shaken, or beaten with a stick, the carpet is set in motion. Due to inertia of rest, the dust particles tend to remain at rest and fall off. (D) Due to the inertia of motion, athletes often continue to move past the line. (C) When branch of a tree is shaken, it sets into motion. The leaves, however, tend to remain in the state of rest. As a result, the leaves may get detached from the branch. (L) When a moving oil tanker suddenly stops, the oil inside the tanker continues to be in the state of motion due to the inertia of motion. As a result, it splashes in the forward direction. Similarly, when a stationary tanker suddenly sets into motion, the oil inside the tanker splashes in the backward direction. If no space is left at the top of the oil, it will overflow. Therefore, to prevent any overflow of the oil due to sudden start or stop of the truck, some space is left at the top while filling the tanker.