Y9 Autumn Term Forces - Corrections

Question 1

From what point does weight act in an object?

Answer 1

From the centre of mass

From the centre of gravity

Question 2

If the forces are balanced there must be an ….

Answer 2

EQUAL resultant force

Question 3

How can you increase moment?

Answer 3

Increase the force

Increase the distance from the force to the pivot point

Question 4

If Bob were testing friction from a block of wood on different surfaces, why would he place masses on the blocks?

Answer 4

To increase the friction because the more force the more friction

Question 5

Why would bob keep the masses constant?

Answer 5

For fair testing because the more mass (force on the block) the more friction. IMPORTANT LINK

Question 6

What is a non-continuous variable?

Answer 6

A variable that doesn’t change

Question 7

What is the equation to work out the moment?

Answer 7

Moment = force x distance

Question 8

What is the principle of moments when an object is in equilibrium?

Answer 8

Anti-clockwise moment = clockwise moment

Question 9

What is the equation for the principle of moments?

Answer 9

Force 1 x distance 1 (perpendicular distance from line of force to pivot) = force 2 x distance 2

Question 10

What is a non continvariable

Answer 10

Something that doesn’t change in the the experiment