yr 10 recap

Question 1

Scalar quantities

Answer 1

Scalar quantities only have a magnitude and do not have a direction.

Question 2

Vector quantities

Answer 2

Vector quantities have both a magnitude and a direction.

Question 3

examples of scalar quantities?

Answer 3

• Mass
• Temperature
• Speed
• Energy
• Distance
• Time
• Volume
• power

Question 4

examples of vector quantities?

Answer 4

• Velocity
• Displacement
• Acceleration
• Force
• Momentum
• Weight
• Electric field

Question 5

A women walks 500 m from her home to the shop. She then walks 200 m to the park and finally 400 m back to her home. What is the overall distance and displacement of her journey?

Answer 5

Her total distance is the 500 m + 200 m + 400 m so 1100 m in total.

However, as she returns to her house, her displacement is 0 m, because she ends 0 m from where she started.

Question 6

A 20 m displacement North is the same as:

Answer 6

-20 m displacement South

Question 7

Is power a vector or a scalar quantity? Explain your answer.

Answer 7

Power is a scalar quantity because it only has a magnitude (how many watts), it doesn’t have a direction.