Stage 2 Physics - Assumed Knowledge

The law of conservation energy states that energy:

• can be created or destroyed

• can be transferred or transformed and must always be conserved

• is always conserved

• can not be created or destroyed only transferred or transformed.

An object begins at the start and travels 12 m East and then 15m West.

• The object has travelled a displacement of 27 m east and west and a distance of 3m west

• The object has travelled a displacement of 3m West and a distance of 27m

• The object has travelled a displacement of -3m West and a distance of 27m

• The object has travelled a displacement of 27m and a distance of 3m West

A sprinter completes the 100m dash in 10s. Assuming the start the race from a stationary position.

The average speed of the sprinter is 10m/s.

• TRUE

• FALSE

A sprinter completes the 100m dash in 10s. Assuming the start the race from a stationary position.

The instantaneous speed at any point throughout the race must not exceed 10m/s.

EXPLAIN WHY!

• TRUE

• FALSE

A sprinter completes the 100m dash in 10s. Assuming the start the race from a stationary position.

The acceleration of the sprinter is greater immediately after the start than just before the end of the race.

EXPLAIN WHY!

• TRUE

• FALSE

Considering the velocity/time graph opposite, at what time period is the object:

Accelerating Positively?

• Period 1

• Period 2

• Period 3 and 4

• Period 4 and 1

• Period 4

Considering the velocity/time graph opposite, at what time period is the object:

Decelerating?

• Period 1

• Period 2

• Period 3

• Period 4

• None of these

Considering the velocity/time graph opposite, at what time period is the object:

Accelerating at an Increasing Rate?

• Period 1

• Period 2

• Period 3

• Period 4

• None of these

Considering the velocity/time graph opposite, at what time period is the object:

Stationary?

• Period 1

• Period 2

• Period 3

• Period 4

• None of these

Considering the velocity/time graph opposite, at what time period is the object:

Moving at Constant Speed?

• Period 1

• Period 2

• Period 3

• Period 4

• None of these