While deriving the relation between force and acceleration for a body of constant mass
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
While deriving the relation between force and acceleration for a body of constant mass, certain implicit assumptions are made.
(a) List any two such assumptions.
(b) Explain why the derivation would not be valid for a rocket whose mass decreases continuously.
(c) Explain how the direction of the net external force is related to the change in momentum of the body according to Newton’s Second Law.