P8

Question 1

What is a Scalar Quantity?

Answer 1

Has size/ magnitude but NO direction

Question 2

What is a Vector Quantity?

Answer 2

Has size/magnitude AND dieectiom

Question 3

What is the difference between Speed and Velocity

Answer 3

Speed is a SCALAR ; only magnitude

Velocity is VECTOR ; magnituide and direction

Question 4

What are examples of Contact Forces?

Answer 4

• Friction
• Air Resistamce
• Stretching

Question 5

What are examples of non-contact forces?

Answer 5

• Magnetic
• Gravitational
• Electrostatic

Question 6

What is Newton’s 3rd Law?

Answer 6

When 2 objects interact with eachother, they exert EQUAL and OPPOSITE forces on eachother

Question 7

What is Netwon’s 1st Law?

Answer 7

If forces acting on an object are balanced, the resultant force is 0

Question 8

What is the Centre of Mass?

Answer 8

The central point at which the mass of the object acts through.

Question 9

What is Displacement?

Answer 9

Distance in a given direction

Question 10

What is Resultant Force?

Answer 10

A single force that has the same effect as all the forces acting on an object

Question 11

What is Newton’s 2nd law?

and formula

Answer 11

Resultant Force = Mass x Acceleration

Acceleration of an object is directly proportional to the resultant force