L3;3,7,13

Question 1

What is force? (The two definitions)

Answer 1

Force is a push or pull by one object onto the other

Force can change motion and or deform objects

Question 2

What are the three factors that categorize force?

Answer 2

1. Magnitude (M)
2. Direction (D)
3. Point of application

Question 3

Force is a ______ quality

Answer 3

Vector

Question 4

Bigger moment arm ______

Smaller moment arm _______

Answer 4

Slower, faster

Question 5

If a torque is going clockwise, what direction is its vector?
If a torque is going counter clockwise, what direction is its vector?

Answer 5

Negative

Positive

Question 6

What is torque?

Answer 6

This is the turning effect of a force

Torque is a vector (has magnitude and direction) and represented as curved arrows.

Question 7

What is the formula for torque?

Answer 7

T= F x dt [NxM]

Question 8

What is a moment arm?

Answer 8

This is the perpendicular distance between the force line of action and fulcrum.

Question 9

What is static equilibrium?

Answer 9

If there is no resultant force or torque acting on an object, the object will not change.

Question 10

What is a

Resultant force
Resultant torque

Answer 10

Resultant force= sum of all forces acting on an object

Resultant torque= sum of all torques acting on an object

Question 11

What is the difference between mass and weight?

Answer 11

Mass=quantity of matter contained in an object

Weight= gravitational force that the earth exerts on a body

Question 12

It is easier to initiate rotation when force is applied ________ and as _______ as possible from/to the fulcrum

Answer 12

Perpendicularly, far

Question 13

Five characteristics that force generation is affected by

Answer 13

1. Muscle length
2. Cross sections area
3. Moment arm
4. Angle of attachment
5. shortening velocity