Starter acceleration speed Slope on a distance-time graph represents acceleration Slope on a velocity-time graph represents speed A body travelling at a steady speed is accelerating if its direction is changing. Velocity is .. speed in a given direction.

Using graphs L.O.: Calculate distance from a velocity-time graph. Calculate speed from a distance-time graph. Calculate acceleration from a velocity-time graph. Velocity and acceleration ws Specimen paper Q 7a) 35 Page 12, Q6, Jan08 Q5 June 08

The area under the line in a velocity-time graph represents the distance travelled.

Q1) calculate accelerations Q2) calculate distance covered

area of triangle = 1⁄2 × base × height Area of light-blue triangle is 1⁄2 × 8 × 4 = 16m. Area of dark-blue rectangle is 8 × 6 = 48m. Area under the whole graph The area of the light-blue triangle plus the area of the dark-blue rectangle is: 16 + 48 = 64m. Q1) calculate accelerations Q2) calculate distance covered area of triangle = 1⁄2 × base × height

Specimen paper Q 7a) 35 7(a) 35 (m) 7(b)(i) transformed into thermal energy or transferred to surrounding Molecules 7(b)(i) 84 000

Velocity and acceleration questions worksheet. Distance-Time graphs velocity-time graphs (Q2, Q3)

To do: Past exam questions Workbook 56-58

Page 12, Q6, Jan08 http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY2H-W-QP-JAN08.PDF velocity includes direction 64 m

Q5 June 08

From velocity-time graph worksheet

Using graphs L.O.: Calculate distance form a velocity-time graph. Calculate speed from a distance-time graph. Calculate acceleration from a velocity-time graph. Velocity and acceleration ws Specimen paper Q 7a) 35 Page 12, Q6, Jan08 Q5 June 08

You will be shown a series of graphs. You have to walk along a line, so that your motion is the same as the graph shows. Each should take about 10 seconds. The exact time and distance is not important. Think about each one before you start to move.

An easy one to start with . . . distance from starting point (m) 10 time (s) An easy one to start with . . .

What’s happening here? Think carefully before you start. distance from starting point (m) 10 time (s) What’s happening here? Think carefully before you start.

distance from starting point (m) 10 time (s) A three-part journey

Going down? Think about what this means before you start. distance from starting point (m) 10 time (s) Going down? Think about what this means before you start.

Negative distance! Again think about this before you start. distance from starting point (m) 10 time (s) Negative distance! Again think about this before you start.

distance from starting point (m) 10 time (s) Everything all at once!

Why is this more realistic? distance from starting point (m) 10 time (s) Why is this more realistic?

Careful! This is a speed–time graph! speed (m/s) 2 time (s) 10 Careful! This is a speed–time graph!

An impossible task? Can this be done? speed (m/s) 2 time (s) 10 An impossible task? Can this be done?

speed (m/s) 2 time (s) 10 A more realistic walk!

A more complicated journey speed (m/s) 2 time (s) 10 A more complicated journey

A little bit of everything speed (m/s) 2 time (s) 10 A little bit of everything

Note: this graph shows velocity not speed. velocity (m/s) 2 time (s) 10 –2 Note: this graph shows velocity not speed.

And finally . . . where should you end up here? velocity (m/s) 2 time (s) 10 –2 And finally . . . where should you end up here?