Lecture 13

Question 1

If the Coefficient of Restitution increases it means the object becomes

Answer 1

More bouncy

Question 2

What is newtons second law of motion

Answer 2

Acceleration

The change of motion of an object is proportional to the force impressed

It is made in the direction of the straight line in which force is impressed

Question 3

The second law occurs when

Answer 3

Sum of F does not equal 0

The object will accelerate in direction of sum of force

Question 4

Acceleration is directly proportional with

It is inversely proportional with

Answer 4

Sum of F

Mass

Question 5

What is the equation of acceleration

Answer 5

Sum of F = ma

Question 6

Average acceleration is caused by

Answer 6

Average net force

Question 7

Average acceleration is

Answer 7

The change in velocity over time

Question 8

Impulse and momentum equation is

Answer 8

Average net force x delta time = m x delta velocity

Question 9

Impulse is represented by

Answer 9

Average net force x delta t

Question 10

Momentum is represented by

Answer 10

M x delta v

Question 11

What is the technique used to increase momentum since average net force is limited somewhat

Answer 11

Increase the force application time (delta t)

Question 12

Decreasing impact force involves (soft landing)

Increasing impact force involves (hard landing)

Answer 12

Flex ankle, knee and hip to increase delta t and decrease average net force

Shorter impact time which is done by a decrease in delta t and increases average net force

Question 13

What is newtons third law of motion

Answer 13

Action-reaction

When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body

Question 14

Action-reaction forces exist in

Answer 14

Mirrored pairs