M1 Kinematics

Question 1

acceleration

Answer 1

the rate of change of velocity with time
- vector quantity

Question 2

acceleration due to gravity (g)

Answer 2

the acceleration of an object freely falling when there is no air resistance
- near the surface of the Earth is 9.8m/s/s

Question 3

air resistance

Answer 3

friction acting on an object moving through air

Question 4

average acceleration

Answer 4

the acceleration of an object measured over a time interval

Question 5

average velocity

Answer 5

the velocity of an object measured over a time interval

Question 6

collinear

Answer 6

points that lie on the same straight line

Question 7

components of a vector

Answer 7

two vectors which act at right angles,
the vector sum of which is the original vector

Question 8

deceleration

Answer 8

decrease in the velocity of an object

Question 9

displacement

Answer 9

change of position in a particular direction
- vector quantity

Question 10

distance

Answer 10

the length moved between two points

Question 11

final velocity (v)

Answer 11

the velocity an object has at the end of a time interval

Question 12

free fall

Answer 12

motion only under the influence of a gravitational field

Question 13

friction

Answer 13

an opposing force that acts in the opposite direction to an object’s motion

Question 14

initial velocity (u)

Answer 14

the velocity an object has at the beginning of a time interval

Question 15

kinematics

Answer 15

the study of how motion occurs (including distance, displacement, speed, velocity, acceleration and time without considering what causes the motion)

Question 16

rectilinear motion

Answer 16

motion in a straight line

Question 17

SI system

Answer 17

the international system of units
- ampere, kelvin, kilogram, metre, mole, second and candela

Question 18

speed

Answer 18

ratio of distance to time

Question 19

uniform

Answer 19

not changing, constant

Question 20

variables

Answer 20

quantities that can change

Question 21

velocity

Answer 21

ratio of displacement to time
- vector quantity

Question 22

velocity-time graph

Answer 22

• gradient of graph is acceleration
• area under the graph is displacement

Question 23

3 equations of motion

Answer 23

s = ut + 1/2 at²
v = u + at
v² = u² + 2as

Question 24

adding vectors?

Answer 24

resultant is from tail of first to head of second

Question 25

relative velocity?

Answer 25

Vₐ ᵣₑₗₐₜᵢᵥₑ ₜₒ B = Vₐ - Vb