Which of the following is NOT an example of the inertia of rest?
- ADust particles falling down when a cloth is beaten or shaken
- BSuddenly applying brakes in a moving vehicle causing passengers to lean forward
- CPassengers falling backwards when a vehicle suddenly starts moving from rest
- DFruits or leaves detaching from branches due to sudden vigorous shaking
Solution & Step-by-step Explanation
Inertia of rest keeps an object at rest until an external force acts on it.
When brakes are suddenly applied in a moving vehicle, passengers fall forward due to the inertia of motion, because the lower part of the body comes to a halt along with the vehicle while the upper part tends to continue moving forward. Thus, it is an example of the inertia of motion, not the inertia of rest. All other options illustrate the inertia of rest.
When brakes are suddenly applied in a moving vehicle, passengers fall forward due to the inertia of motion, because the lower part of the body comes to a halt along with the vehicle while the upper part tends to continue moving forward. Thus, it is an example of the inertia of motion, not the inertia of rest. All other options illustrate the inertia of rest.