Question

3. The seat belts are provided in the cars so that if the car stops suddenly
due to an emergency braking, the persons sitting on the front seats are
not thrown forward violently and saved from getting injured. Can you
guess the law due to which a person falls in forward direction on the
sudden stopping of the car?
(a) Newton's first law of motion
(b) Newton's second law of motion
(c) Newton's third law of motion
(d) Newton's law of gravitation​

Answer 1

Newton's third law of motion

Explanation:

As the breaks are applies the force coming from behind pushes them forward

Answer 2

Due to Newton's first law of motion, a person falls in the forward direction after the sudden stopping of the car.

• It is Newton's first law of motion, which states, "if a body is at rest or moving at a constant speed in any particular direction, it will remain at rest or keep moving in the same direction, unless it is acted upon by an external force". This law is also referred to as the law of inertia.
• Therefore, when the brakes are suddenly used to stop the moving car, external forces act on the car, and thus the initial condition of the car changes from moving to the final, stopped condition.
• There are many examples where we can observe Newton's first law being applied in our daily life such as a book kept on the table will remain there stationary unless someone applies an external force to pick it up.
• Similarly, if a ball rolls on the ground, it stops because of external force, that is friction between the ball and the ground, otherwise, it would keep rolling forever and will never stop.