BIOMECHANICS 4

Question 1

Is WEIGHT a horizontal or vertical force?

Answer 1

Vertical

Question 2

Is REACTION a horizontal or vertical force?

Answer 2

Vertical

Question 3

Is FRICTION a horizontal or vertical force?

Answer 3

Horizontal

Question 4

Is AIR RESISTANCE a horizontal or vertical force?

Answer 4

Horizontal

Question 5

What is WEIGHT?

Answer 5

The gravitational pull that the earth exerts on a body.

Question 6

What is REACTION?

Answer 6

An equal and opposite force exerted by a body in response to the action force upon it.

Question 7

What is FRICTION?

Answer 7

A force that opposes the motion of the two surfaces in contact.

Question 8

What are the factors affecting Friction? [4]

Answer 8

Roughness of the contact surface
Roughness of the contact surface
Temperature
Size of normal reaction

Increase roughness = more friction
Increase temperature = more friction
Increase normal reaction (mass) = creates equal and opposite force therefore more friction

Question 9

What is AIR RESISTANCE?

Answer 9

Opposes moron of a body travelling through the air.

Question 10

What are the factors affecting AIR RESISTANCE? [4]

Answer 10

Velocity
Shape
Frontal cross sectional area
Smoothness of surface

More velocity = more AR
More aerodynamic the shape = more AR
Increase cross sectional area = more AR
Increase smoothness = less AR