When the driver of a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by

The correct answer is Newton's first law.

Key Points

• When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by Newton’s first law
• This is true because of the law of inertia when the bus was moving with some constant velocity hence passengers will also move with the bus.
• And suddenly when the bus driver applies the brake, the velocity of the bus will become zero but the passengers will keep moving forward unless no external force is applied on the bus
• Hence only option B is correct.

Additional Information

• Newton's Third Law of Motion states that 'To every action, there is an equal and opposite reaction'.
• When the rocket is ignited, it releases gases from its thrusters thereby creating a force that will push rocket upwards which provides a necessary force that helps it in moving ahead.
• Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied force in the direction of the force. i.e. F=ma. Where F is the force applied, m is the mass of the body, and a is the acceleration produced.
• A fielder pulling his hand back while catching a ball is an application of Newton's second law of motion.
• Newton First law states that Every object remains in uniform motion in a straight line unless compelled to change its state by the action of an external force.
• When a bus starts suddenly, the passengers receive a backward jerk an application of Newton's first law of motion.