com quiz

Question 1

force

Answer 1

Mechanical interaction that goes on between two objects or bodies (push/pull) (force = mass x acceleration)

Question 2

speed

Answer 2

Change in displacement

Question 3

displacement

Answer 3

The movement of an object from its stationary place/position

Question 4

acceleration

Answer 4

The increase of speed within a subject (acceleration = change in velocity/time)

Question 5

centre of mass

Answer 5

Mathematical point around which the mass of a body or object is evenly distributed

Question 6

change in body position during sporting activities can change

Answer 6

the position of the center of mass

Question 7

first class lever

Answer 7

The effort force and resistance force are on opposite sides of the fulcrum. The effort is applied at one end of the lever and the load is at the other, with the fulcrum somewhere between

Question 8

second class lever

Answer 8

The effort force and resistance force are on the same side of the fulcrum, but with the effort arm longer than the resistance arm. The effort is applied at one end of the lever and the fulcrum is located at the other, with the load in between them.

Question 9

third class lever

Answer 9

The effort and the resistance forces are on the same side of the fulcrum, but the effort arm is smaller than the resistance arm. The effort is applied between the load and the fulcrum.

Question 10

1st class lever example

Answer 10

The head and neck joint. The force/effort is the neck stretching whilst the resistance/load is the front of the skull, causing the fulcrum to be in between.

Question 11

2nd class lever example

Answer 11

The plantarflexion of the foot. The force and resistance both exist at the feet. The resistance is more specifically the heel of the foot as it is getting lifted. The fulcrum is the toes of the foot as they are enacting the lifting. The force is the calf as it is lifting the body.

Question 12

3rd class lever example

Answer 12

The arm in whole. The bicep would be the effort as it is contracting, the fulcrum is the elbow itself, and the load is the forearm and the hand as they are lifting

Question 13

the tricep-elbow joint is a

Answer 13

first class lever

Question 14

the calf-ankle joint is a

Answer 14

second class lever, the load is in between the effort and the fulcrum. In the case of the ankle joint, the heel or calf would be the effort, the fulcrum would be at the toes and the load is in between the two

Question 15

the biceps-elbow joint is a

Answer 15

third class lever, is bicep is the effort as it is contracting, the fulcrum is the elbow itself, the load is the forearm and the hand as they are lifting

Question 16

first law of motion

Answer 16

Inertia - states that every object will stay stationary until an external force is acted upon it

Question 17

second law of motion

Answer 17

It is when the force applied to an object becomes the mass of the object multiplied by the acceleration of the object

Question 18

third law of motion

Answer 18

States that for every action, an equal and opposite reaction also presents

Question 19

1st law example

Answer 19

The soccer ball will stay at rest until a player comes and kicks it

Question 20

2nd law example

Answer 20

The acceleration of a hockey puck depends on how heavy the puck is and how hard the player hits it

Question 21

3rd law example

Answer 21

When a basketball player bounces a basketball, the force has an opposite reaction which brings the ball back up