# Forces And Motion (P1, P2, P3) Flashcards

Define displacement

- Vector quantity

* The direction and distance that an object moves in a straight line from start to finish.

Define speed

- Scaler quantity

* Just how fast an object is moving (no direction).

Define velocity

- Vector quantity

* How fast an object is moving in a certain direction.

What is the speed equation?

Speed = Distance / Time

What is the equation for acceleration?

Acceleration = (Final Velocity - Initial Velocity) / Time

OR

Acceleration = Change in Velocity / Time

What is the first law of motion?

Balanced forces mean no change in velocity.

What is the second law of motion?

A resultant force means acceleration or deceleration.

What is the third law of motion?

If an object exerts force onto another object, then that object exerts and equal and opposite force back.

What is the force equation?

Force = Mass x Acceleration

Define distance

- Scalar quantity

* How far an object moves (no direction)

What does gradient measure in DT and VT graphs?

Distance-Time -> Speed

Velocity-Time -> Acceleration

What does the area under the graph represent in DT and VT graphs?

Distance-Time -> Nothing

Velocity-Time -> Distance

What is the difference between vector and scalar quantities?

Vector -> Have magnitude and direction

Scalar -> Have only magnitude

Give some examples of scalar quantities.

Time, Speed, Distance, Mass

Give some examples of vector quantities.

Acceleration, Force, Momentum, Weight, GFS