Physics force mass momentum

Question 0

Mass

Answer 0

Measure of how difficult it is to accelerate a body

F inversely proportional to m

Question 1

Force

Answer 1

Anything that causes velocity to change
Unit- N newton
F=ma / p= f/a

Question 2

Acceleration

Answer 2

Rate of change of velocity per unit time
Unit- m(-2)
F proportional to a

Question 3

Newtons 1st law of motion

Answer 3

A body will remain at rest or travelling at a constant velocity until an external, unbalanced force acts on it

Question 4

Newtons 2nd law of motion

Answer 4

When an external. Unbalanced force acts on a body, rate of change of bodies momentum is directly proportional to force applied in the direction of the force

F=ma special case of this law

Question 5

Newtons 3rd law of motion

Answer 5

When body A exerts a force on body B, body B exerts an equal but opposite force on A

Eg firing a gun
Exploding cartridge exerts force, accelerates bullet, exerts a reaction force on gun which gives it a recoil

Question 6

Friction

Answer 6

-

Question 7

Principle of conservation of momentum

Answer 7

When to bodies come in contact, total momentum before interaction is equal to total momentum after it
M1f1 + M2f2 =M3f (if stick together)