Answer:
For now, I am typing this answer. To type, I am exerting force on the keyboard keys. Until then they won’t type this answer themselves. 1st law of motion. (Object remains at rest until an external force acts on it).
Let’s see another example with different background. Imagine an astronaut in space performing a spacewalk. He throws a ball in to space with a velocity ‘v’. The ball will travel with that particular velocity (speed + given direction) until an external force acts on it to stop/change velocity.
You are driving a car. You push the accelerating pedal and keep it stable at a particular point. This results in a uniform force on the car by the engine. But do you experience sudden velocity increase and stabilization. No, it acts as per the 2nd law, ‘F = ma’. It means that at that certain force the car moves at a certain acceleration, and you can see the change of velocity with respect to it.
You are walking. Do you think you doing it all by yourself…? If you think like that, you are completely wrong. When you walk you are pushing the ground backwards, which results in generating the required frictional force to create the reaction force to help you walk forward. Without this reaction force we would all be performing ‘Moonwalk’ without practice.. ;) This is the 3rd law. (Every action has an equal and opposite reaction)
Almost everyone knows this example. Launching rockets in the space. The thrust force acts upon the rocket which it produces by burning gallons of fuel per second. This helps the rocket to break the escape velocity barrier of earth and ultimately go to space.
Explanation:
PA BRAINLIEST PLZZ
