Physics chapter 4

Question 1

What is the principal of moment

Answer 1

That when the in equilibrium, the sum of the clockwise moment should be the same as the anti-clockwise moment.

Question 2

What is the calculation of momebt

Answer 2

Force x Distance

Question 3

Definition of moment

Answer 3

Turning effects of a force about a pivot

Question 4

The SI unit for moment

Answer 4

Nm

Question 5

What does a vector have

Answer 5

A magnitude and a direction

Question 6

Define equilebrium

Answer 6

A state of balance between opposing forces or actions

Question 7

Define center of mass

Answer 7

Imaginary point in a body where the total mass seems to be acting

Question 8

When is an object stable

Answer 8

As long as the center of mass is over the center

Question 9

Define center of gravity

Answer 9

The point at which the distribution of weight is equal in all directions, and depends on the gravitational field.

Question 10

Define stability.

Answer 10

The ability of an object to maintain its balance after being disturbed.

Question 11

How does lowering an object center of mass/gravity affect its stability?

Answer 11

It makes the object more stable.