# Topic 1 Flashcards

What are vectors?

Quantities with a magnitude and direction

Is force a vector or scalar quantity?

Vector

Is velocity a vector or scalar quantity?

Vector

Is displacement a vector or scalar quantity?

Vector

Is weight a vector or scalar quantity?

Vector

Is acceleration a vector or scalar quantity?

Vector

Is momentum a vector or scalar quantity?

Vector

What is a scalar quantity?

A physical quantity that only has magnitude and no direction

What is magnitude?

Size

Is speed a vector or scalar quantity?

Scalar

Is distance a vector or scalar quantity?

Scalar

Is mass a vector or scalar quantity?

Scalar

Is energy a vector or scalar quantity?

Scalar

Is temperature a vector or scalar quantity?

Scalar

Is time a vector or scalar quantity?

Scalar

What is distance?

How far an object has moved

What is displacement?

The distance and direction in a straight line from an object’s starting point

What does speed measure?

How fast you’re going with no regard to the direction

What does velocity measure?

How fast you’re going in a given direction (speed in a given direction)

What is the typical waking speed?

1.4 m/s (5km/h)

What is the typical running speed?

3m/s (11km/h)

What is the typical cycling speed?

5.5 m/s (20km/h)

What is the typical speed of cars in a built up area?

13m/s (47km/h)

What is the typical speed of cars on a motorway?

31m/s (112 km/h)

What is the typical speed of trains?

Up to 55m/s (200km/h)

What is the typical wind speed?

5-20m/s

What is the typical speed of sound in air

340m/s

What is acceleration?

The change in velocity in a certain amount of time

What is deceleration?

Negative acceleration

If something slows down, what happens to the change in velocity?

The change in velocity is negative

How would you estimate the acceleration or deceleration of an object?

1) estimate how long it would take for the object to stop moving - use the approximate symbol in front of the value (~)

2) put the estimate into the equation

What is constant acceleration known as?

Uniform acceleration