What is the difference between distance and displacement?

Displacement is a vector, direction isn’t

What is the equation for finding speed?

Speed (m/s) = distance(m) / time(s)

What is a vector?

A quantity that has a magnitude and a direction

What is on the y-axis in a distance-time graph?

Distance

How can you calculate speed in a distance-time graph?

Find the gradient if the line

What do horizontal lines in a distance-time graph mean?

The object is stationary

What is acceleration?

A moving object’s change in velocity

What does getting a negative value when calculating acceleration mean?

The object is decelerating or slowing down

What is the equation for calculating acceleration?

a = (v - u) / t a = (final velocity - initial velocity) \ time

What is acceleration measured in?

m/s^2

Metres per second squared

What does a horizontal line in a velocity-time graph mean?

The object is travelling at a constant velocity

How does the steepness of the line affect acceleration in velocity-time graph?

The steeper the line the greater the acceleration

How do you calculate distance from a velocity-time graph?

You find the area under the graph

What is a force?

A push or a pull that can make objects change speed, shape or direction

Is force a vector quantity?

Yes

When are forces balanced?

When they are equal but acting in opposite directions

What is a resultant force?

When all the forces acting on an object are combined into one

What happens if the resultant force on an object isn’t 0?

The object will accelerate in the direction of the resultant force

What does the size of acceleration from a resultant force depend on?

The size of the force and the mass of the object

How do you calculate force?

F = m x a F = mass (kg) x acceleration

What do you measure force in?

N, newtons

What is gravitational field strength measured in?

N/kg

What is the equation used to calculate weight?

W = m x g W = mass x gravitational field strength

What is the gravitational field strength on Earth?

10N/kg

As mass increases, what happens to the force from gravity?

It increases

What is terminal velocity?

The constant maximum velocity reached when the forces acting on a falling object are balanced