Modelling In Mechanics & Statistics

Question 1

What does it mean if a string/rod or pulley is inextensible?

Answer 1

The acceleration is constant
In a pulley, the acceleration is the same on both particles

Question 2

What may be the drawbacks of a ball being modelled as a particle?

Answer 2

-Air resistance and other rotational forces are ignored
-In reality the mass may not be concentrated at a single point

Question 3

What does it mean if a string is light?

Answer 3

Tension is the same on both ends of the string

Question 4

What conditions are to be met for binomial distribution to be suitable?

Answer 4

-A fixed number of trials
-A fixed probability of success
-Two possible outcomes
-The trials are independent