-Vectors

Question 1

What is a vector and a scalar?

Answer 1

A vector is a quantity with both magnitude and direction (eg. velocity or displacement)
Whereas a scalar has magnitude but no direction (eg. speed)

Question 2

What is Newton’s third law?

Answer 2

When two objects interact, they exert equal but opposite forces on each other.

Question 3

What is Newton’s first law?

Answer 3

If forces acting on an object are balanced the resultant force is 0 meaning a stationary object will remain still, or an object at a constant velocity will stay at a constant velocity.

Question 4

What is a moment?

Answer 4

the turning effect of a force.

Question 5

How can you increase the impact of a moment?

Answer 5

-increase the length of which the force is applied on.
-increase the effort put in

Question 6

What is the formula for moments?

Answer 6

moment (Nm) = force (N) x perpendicular distance from the pivot (m)

Question 7

Gear A is twice as big as gear B, compare their turning effects:

Answer 7

Gear A has double the turning effect of gear B. this is because when both do a full round, gear A would make more impact than B.

Question 8

What is centre of mass?

Answer 8

the point of an object where its mass is mostly concentrated.