SP1a Forces and Motion

Question 1

Scalar Quantities?

Answer 1

magnitude (size) only.

Question 2

Vector Quantities?

Answer 2

magnitude and direction.

Question 3

Examples of scalar quantities (4).

Answer 3

.mass
.distance
.energy
.speed

Question 4

Examples of vector quantities (5).

Answer 4

.force
.weight
.velocity
.displacement
.momentum
.acceleration

Question 5

What is a freebody diagram?

Answer 5

a simple diagram of an object showing all the forces acting on that object at once.

Question 6

What do you need to do to work out resultant force?

Answer 6

solve both vertical and horizontal forces.

Question 7

What do we do when forces are going opposite each other?

Answer 7

subtract.

Question 8

What do we do when forces are going towards each other?

Answer 8

subtract.

Question 9

What do we do when forces are going in the same direction?

Answer 9

add.

Question 10

Describe, with examples, how objects can interact at a distance without contact (3).

Answer 10

.Gravitational: gravity pulling down without physical contact, apple falling from tree
.Electrostatic: pulling or pushing on object without contact
.Magnetic: two magnets pull togther or push apart

Question 11

Describe, with examples, how objects can interact with contact (3).

Answer 11

.Tension: force between a cable holding a light in the ceiling
.Air resistance: when an object falls through the air
.Friction: when two objects pass each other