CH2: Kinematics

Question 1

definition of scalar

Answer 1

quantities that only have magnitude

Question 2

definition of vector

Answer 2

quantities which have magnitude and direction

Question 3

list the 6 scalar quantities

Answer 3

distance, mass, speed, time, temperature, pressure

Question 4

list the 6 vector quantities

Answer 4

displacement, velocity, weight, force, acceleration, moment

Question 5

how to calculate average speed?

Answer 5

total distance/total time

Question 6

acceleration formula

Answer 6

(v-u)/t
or
(final velocity - initial velocity)/time taken

Question 7

what is the gradient of a velocity-time graph?

Answer 7

acceleration

Question 8

how to calculate distance in a velocity-time graph?

Answer 8

area under graph
(it is also the formula for calculating distance in graphs)

Question 9

what is the gradient of a distance-time graph?

Answer 9

speed

Question 10

what happens when object falls with air resistance?

Answer 10

object will experience air resistance as its speed increases. When air resistance = weight of object, object will fall at a constant speed. This means that acceleration is 0 m/s^2.

Question 11

what happens to the speed and acceleration when there is no air resistance?

Answer 11

speed will become constant.
acceleration = 10 m/s^2