ch5 forces and friction

Question 1

What is important about a force at an angle?

Answer 1

-It will have a vertical and horizontal component.

Question 2

When resolving forces what is important about the force?

Answer 2

-Force must always be hypotenuse

Question 3

if a box has a force working on it at an angle but it is in equilibrium how could you work out the normal reaction force?

Answer 3

-R-(8g+vertical component) = 0

Question 4

If there are two forces working at an angle how could you calculate the resultant force?

Answer 4

Resolve for horizontal and vertical.

• Add the horizontal forces.
• Add the vertical forces.

-Then create new triangle with these values and work out hypotenuse.

Question 5

• When working with forces on a slope how are forces dealt with?
• How does the weight act on the slope?

Answer 5

• Forces parallel to the slope
• Forces perpendicular to the slope.

-Works perpendicular so has a horizontal and vertical component.

Question 6

What is the formula for max friction?

Answer 6

Fmax= mew x R

Mew is coefficient of friction.
R is normal reaction force.

Question 7

When is friction at its maximum value?

Answer 7

-When it is in limiting equilibrium or when the particle is moving.