Fill in the following blanks with suitable words:
(a) To every action, there is an ………. and ……..reaction.
(b) Momentum is a ……..quantity. Its unit is …………….
(c) Newton’s second law of motion can be written as Force = mass × …………… or Force = …………….. or change of …………
(d) Forces in a Newton’s third law pair have equal …………… but act in opposite …………
(e) In collisions and explosions, the total ………… remains constant, provided that no external ………… acts.
(a) equal; opposite (As per Newton’s third law)
(b) Vector; kg m/s (As momentum is the product of mass and velocity and velocity is a vector quantity)
(c) Acceleration; rate; momentum
(d) Magnitude; directions (Conservation of momentum)
(e) Momentum; force; (Explained in conservation of momentum)