motion and forces

What is a scaler quantity?

A quantity that requires magnitude (size) but not direction.

What is a vector quantity?

A quantity that requires both direction and magnitude

What quantity is displacement/distance?

Scalar.

What quantity is speed/velocity?

Speed is scaler, velocity is vector.

What quantity is acceleration?

Vector

What quantity is force?

Vector

What quantity is weight/mass?

Weight is vector, mass is scalar.

What quantity is momentum?

Vector.

What quantity is energy?

Scalar.

What is velocity?

Speed in a stated direction.

What is the equation for speed?

Speed= distance divided by time.

What is the equation for distance?

Speed x time.

What is newtons first law?

every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. So basically no force=no acceleration.

What is happening if the resultant force is 0?

The body is moving at a constant velocity or is at rest

What is happening if a resultant force is not 0?

the speed and/or direction of the body change(s)

What is Newton’s second law?

Force = mass x acceleration

What does this mean?

1 newton is the force required to give a 1kg object a 1ms-2 acceleration

Define weight.

How much “stuff” is in your body/the force produced by gravity acting on your body/the force produced by gravity acting upon your mass