Physics year 10

Question 1

Scalar Quantity

Answer 1

Has a magnitude only

Question 2

Vector Quantity

Answer 2

Has both a magnitude and direction

Question 3

Displacement

Answer 3

Final position - initial position (pythag sometimes)
-Is a vector

Question 4

Speed

Answer 4

distance/time
- m/s or km/h

Question 5

Velocity

Answer 5

displacement/time
- m/s or m/s^-1 with a direction

Question 6

Position-time graphs

Answer 6

• Can be used to determine both speed & velocity
• Straight line = object is stopped
• Angle of slope determines speed/velocity
• triangle formula needed sometimes

Question 7

Velocity-time graphs

Answer 7

• Graph looks like a sideways T
• Velocity of an object over period of time
• When moving from positive to negative object is changing direction

Question 8

Acceleration

Answer 8

acceleration = change in velocity/time
m/s^2 or m/s^-2

Question 9

Converting between m/s and km/h

Answer 9

multiply or divide by 3.6

Question 10

Unit for forces

Answer 10

Newtons

Question 11

Contact forces (FATSPN)

Answer 11

-Friction
-Air resistance
-Tension
-Spring
-Normal
-Push/pull

Question 12

Non-contact forces (GEM)

Answer 12

-Gravity
-Electrical forces
-Magnetism

GEM

Question 13

Net force

Answer 13

Sum of all forces acting upon an object

Question 14

Balanced & unbalanced force

Answer 14

Balanced = equal/zero
Unbalanced = not equal

Question 15

Newton’s First Law

Answer 15

An object at rest stays at rest, or in motion stays in motion unless acted upon by an unbalanced force

Question 15

Force due to gravity

Answer 15

Force due to gravity = mass x gravitational field strength

Question 15

Gravitational potential energy (J) (Joules)

Answer 15

Eg = mass x gravity (9.8m/s2) x change in height

Question 16

Newton’s Second Law

Answer 16

Force = mass x acceleration
Mass & acceleration inversely proportional

Question 16

Kinetic Energy (J) (Joules)

Answer 16

Ek = 1/2 x mass x velocity^2
Ek = 1/2mv^2

Question 16

Newton’s Third Law

Answer 16

For every action, there is an equal and opposite reaction

Question 16

Potential energy types (CEEG)

Answer 16

-Chemical
-Elastic
-Electrical
-Gravitational

CEEG

Question 17

Relationship between Kinetic and Potential

Answer 17

Inversely proportional

Question 18

Force due to gravity

Answer 18

= mass x gravity

Question 19

Rocket example

Answer 19

⬆force = reaction
🚀
⬇force = action

Question 20

Forces acting on a person sitting down

Answer 20

⬆normal
🟦
⬇gravity

Question 21

Forces acting on a car

Answer 21

……………………⬆Normal
Resistance⬅⬜➡➡➡Applied force
…………………..⬇Gravity