10 - Forces and motion Flashcards
1
Q
What’s Newton’s first law?
A
An object at rest and that an object moving with constant velocity will continue to move with constant velocity unless an unbalanced force acts on the object.
2
Q
What is Newton’s second law?
A
F = ma
3
Q
What is Newton’s third law?
A
Every action has an equal and opposite reaction.
4
Q
How is an inextensible string used in modelling?
A
The acceleration of masses is the same.
5
Q
If a string is light, how is this used in modelling?
A
The tension is the same through the string, and the mass of the string is negligible.
6
Q
If a pulley is smooth, what does it mean?
A
The tension is the same on either side of the pulley.
7
Q
Write the equation of motion for A. What does this mean?
A
Write the F = ma form
