induction to kinetics

Question 1

what is the definition of mass?

Answer 1

Mass (or Inertial Mass): this is a measure of how much “stuff”, or matter, an object is composed of. It is a measure of the inertia of a body. So the more “stuff” the more massive the object. (scalar)

Question 2

what are the S.I. base unit for mass

Answer 2

Kilogram, kg

Question 3

what is newtons 2nd law?

Answer 3

force is proportional to the acceleration it causes and acts in the same direction

Question 4

what are is the equation for force?

Answer 4

F = m.a
(force = mass x acceleration)
[kg.m.s-2 or N]

Question 5

what is an external force

Answer 5

a force from outside the body

Question 6

what is an internal force

Answer 6

a force from inside the body

Question 7

what are the 2 types of quantitative measures?

Answer 7

SCALAR QUANTITIES

VECTOR QUANTITIES

Question 8

what are scalar quantities?

Answer 8

These only need magnitude to describe them.

EG: Mass, height, volume, blood pressure, HR, mass, energy, speed

Question 9

what are vector quantities?

Answer 9

These need not only magnitude to describe them, but also direction.

Question 10

how are vectors indicated

Answer 10

Vectors can be indicated by the use of bold type, or an arrow over the top of a letter or a curvy line.

Question 11

if a free diagram has more than 3 vectors?

Answer 11

you can add the 3 vectors together with the angles.