[SEC 3] CHAPTER 2 - kinematics

Question 1

define distance

Answer 1

the total length of the path taken by the object regardless of the direction of motion

Question 2

define displacement

Answer 2

the linear length from the starting position of the object to its final position

Question 3

define speed of an object and SI unit of speed

Answer 3

definition:
- the distance travelled per unit time
OR
- the rate of change of distance

SI unit: metre per second (m s^-1)

Question 4

define velocity and SI unit

Answer 4

definition:
- the distance travelled per unit time in the stated direction
OR
- the rate of change of displacement

SI unit: metre per second (m s^-1)

Question 5

define acceleration and its formula and its SI unit

Answer 5

definition: the rate of the change of velocity

formula:
(v-u) / t

SI unit: metre per second square (m^-2)