quad

Question 1

two distinct real roots

Answer 1

discriminant is more than 0

Question 2

one repeated root

Answer 2

discriminant is equal to 0

Question 3

no real roots

Answer 3

discriminant is less than 0

Question 4

5i + 4j…

Answer 4

vector (5 4) aka 5 to the right and 4 up

Question 5

Particle

Answer 5

Rotational forces and air resistance can be ignored
Mass of object is concentrated at a single point

Question 6

Light object

Answer 6

Treat object as having 0 mass
Tension is the same at both ends of a light string

Question 7

Inextensible string

Answer 7

Acceleration is the same in objects connected by string

Question 8

Smooth surface

Answer 8

No friction between surface and any object on it

Question 9

Rough surface

Answer 9

Objects in contact with surface experience frictional force if they are moving or are acted on by a force

Question 10

Smooth and light pulley

Answer 10

Tension is same on either side of pulley
Pulley has no mass

Question 11

SI Units

Answer 11

Mass - kg
Length/displacement - m
Time - s
Speed/velocity - ms-1
Acceleration - ms-2
Force/weight - N

Question 12

Velocity?

Answer 12

v = u + at

Question 13

Displacement..original?

Answer 13

s = 1/2 (u + v) t