Mechanics

Question 1

Suggest a refinement to the model of the parachutee jumping out:

Answer 1

• include effect of wind
• use a more accurate value of g

Question 2

light string

Answer 2

tension is the same throughout, mass of string is negligible

Question 3

inextensible string

Answer 3

acceleration Is the same for two particles attached to the string when the string is taut

Question 4

smooth pulley

Answer 4

No friction. So the tension is the same on both sides of the pulley.