Linear momentum

Question 1

Define linear momemtum as:
Is it of scalar or vector nature?

Answer 1

• 𝐩 = 𝑚𝐯
• It is a vector

Question 2

Recall and apply Newton’s second law in the form:

Answer 2

• Σ𝐅 = d𝐩/dt

Question 3

State the principle of conservation of momentum

Answer 3

• The total momentum before a collision = the total momentum after a collision, provided no resultant external force has acted
• It is always conserved

Question 4

Appreciate the principle as a consequence of Newton’s second and third laws

Answer 4

See notes page