Forces and their interactions

Question 1

What is a scalar?

Answer 1

Scalar quantities have magnitude only NO DIRECTION.

Question 2

What is a vector?

Answer 2

Vector quantities have magnitude and an associated direction

Question 3

Examples of contact forces?

Answer 3

friction, air resistance, tension and

normal contact force

Question 4

Examples of non-contact forces?

Answer 4

gravitational force, electrostatic force and magnetic force.

Question 5

If an object is stationery or moving at a constant velocity, what does this mean?

Answer 5

There is 0 resultant force on the object meaning all opposing forces are equal each other so cancel each other out.

Question 6

How to calculate momentum?

Answer 6

velocity x mass

Question 7

Give an example of a scalar and vector?

Answer 7

Speed is a scalar, whereas velocity is a vector.

Question 8

How to workout average speed (scalar)

Answer 8

Total distance/ time

Question 9

Average velocity (vector)

Answer 9

Direct distance/ time

Question 10

What else do we call direct distance?

Answer 10

Displacement