P5- Forces and their interactions ((5.1))

Question 1

what is a scalar quantity?

Answer 1

• not direction dependant

- magnitude

Question 2

what is a vector quantity?

Answer 2

• magnitude

- direction

Question 3

How can a vector quantity be drawn and

what does it show?

Answer 3

• As an arrow
• The length of the arrow represents the
  magnitude
• The arrow points in the associated
  direction

Question 4

what is a force?

Answer 4

a push or pull acting on an object due to an interaction with another object

Question 5

what are the two categories that all forces can be split into?

Answer 5

• contact

- non contact

Question 6

Give three examples of contact forces

Answer 6

• Friction
• Air resistance
• Tension

Question 7

Give three examples of non contact forces

Answer 7

• Gravitational
• Static
• Magnetic

Question 8

Is force a vector or a scalar quantity?

Answer 8

• Vector

- magnitude + direction

Question 9

Give three examples of vector quantities

Answer 9

• Velocity
• Displacement
• Force

Question 10

Give three examples of scalar quantities

Answer 10

• temperature
• time
• mass

Question 11

Define weight

Answer 11

the force that acts on an object due to gravity and the object’s mass

Question 12

what quantities does weight depend on?

Answer 12

weight = mass x grav. field strength

Question 13

what is the unit used for weight?

Answer 13

Newtons (N)

Question 14

what is the unit used for gravitational field strength?

Answer 14

N/Kg

Question 15

what is meant by an object’s centre of mass?

Answer 15

the single point where an object’s weight can be considered to act through

Question 16

what piece of equipment can be used to measure an objects weight?

Answer 16

a balance or newton-meter

Question 17

what is the name given to the single force that is equivalent to all the other forces acting on a given object?

Answer 17

the resultant force