TRANSPORT

Question 1

distance

Answer 1

how far an object can move

Question 2

speed

Answer 2

distance travelled per unite time

Question 3

velocity

Answer 3

speed in a particular direction (vector)

Question 4

acceleration

Answer 4

change of velocity over time

Question 5

balanced forces

Answer 5

• resultant force is 0
• the object will remain at rest of already at rest

Question 6

unbalanced force

Answer 6

• objects will have a resultant force on it that will accelerate it (positively or negatively)

Question 7

force diagram

Answer 7

illustrate forces using arrows to indicate both magnitude and direction

Question 8

free body diagrams

Answer 8

simplified visual representation of forces which do not include magnitudes

Question 9

engine

Answer 9

mechanical device that converts forms of energy

Question 10

internal combustion engine

Answer 10

• fuel is burned inside of the engine
• a controlled explosion drives a piston up and down a cylinder, and this motion is converted into motion of the wheels

Question 11

induction motors

Answer 11

• engines used for electric vehicles
• series of rings with copper wires (stator) conducts electricity at variable rates to create a rotating magnetic field
• the field induces the rotor with an electrical current causing it to spin and driving the motion of the wheels
• pressing the accelerator will change the frequency of current, increasing the spinning of the rotor

Question 12

turbines

Answer 12

• used for aircraft’s
• fan blades spin at high speeds and compress the air
• fuel is injected into the compressed air and an electric spark ignites it
• the burning gases expand and are forced out through the nozzle at the back of the turbine
• the action of gases shooting outwards causes the engine to move forward