IG Phy – Measurement, Scalars and Vectors

Physicists use digital timers to measure time.

When using a ruler, the line-of-sight must always be parallel to the ruler.

The correct reading on a measuring cylinder is taken at the top of the meniscus.

1 cm³ is equivalent to 1 ml.

Hand-operated stopwatches have an accuracy limited by human reaction time.

Scalars have both magnitude and direction.

Speed is a scalar quantity.

The force acting on a car is a vector quantity.

A bicycle with a mass of 80 kg and a rider of mass 60 kg has a total mass of 140 kg.

The volume of a mug is a vector quantity.

The velocity of an object is described as 3.0 m/s to the right.

Acceleration is a scalar quantity.

To determine the resultant force of two forces acting together, you can use a scale drawing.

The resultant force of a 2.0 N and 3.0 N force both acting to the right is 1.0 N.

When adding two vectors at right angles, you can use Pythagoras\’ rule to find the magnitude of the resultant vector.