When a running motorbike accelerates suddenly the pillion rider tends to fall backward. This is an example of
Newton’s first law of motion
A) Newton’s first law of motion: If an object is in a state of rest or uniform motion, it tries to be in that state of condition unless any external force is applied to the object. This is also known as the law of inertia.
e.g. If a motorbike accelerates suddenly the pillion rider tends to fall backward because initially body was in rest and it will try to be in rest so if the motorbike starts accelerating it means there is some external force started acting toward forward and the body opposes this external force hence this law is also known as the law of inertia.
B )Newton’s second law of motion: Force applied to the object is directly proportional to the change in momentum of the object.
C) Newton’s third law of motion: When two objects interact, they experience some forces of equal magnitude in opposite directions. In short “to every action, there is an equal and opposite reaction.”
D) Newton’s law of Gravitation of motion: When two massive objects of masses ‘m1’ and ‘m2’ are separated at a distance ‘r’, they experience attractive forces towards each other.
Hence option (a) is correct.