A1 Motion, mass, and forces

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A1 Motion, mass, and forces by Mind Map: A1 Motion, mass, and forces

1. Units of measurement

1.1. SI units

2. Displacement

2.1. metre(m)

2.2. Vectors

2.2.1. Both magnitude and direction

3. Speed and velocity

3.1. Average speed=Total distance travelled/total time taken

3.1.1. m/s

3.2. AverageVelocity=displacement/time taken

3.2.1. m/s

3.2.1.1. Vector

4. Acceleration

4.1. Average acceleration=change in velocity/time taken

4.1.1. ms-2

4.1.1.1. Vector

4.2. Velocity time graph

4.2.1. gradient

5. Force

5.1. newton(N)

5.2. Vector

5.3. If 2 or more forces act on something, their combined effect

5.3.1. Resultant force

5.3.1.1. balanced=0

5.3.1.1.1. acceleration is 0

5.4. resultant force=massxacceleration

5.4.1. F=ma

5.4.1.1. more mass,more force is needed to produce any given acceleration

6. Weight and g

6.1. Weight

6.1.1. Newton(N)

6.2. Mass

6.2.1. Kg

6.3. gravitational field strength

6.3.1. g

6.3.1.1. 10N/kg

6.4. acceleration

6.4.1. weight/mass=10ms-2

6.4.1.1. g

6.4.1.1.1. acceleration of free fall

6.5. F=ma

6.5.1. Force=weight

7. Moments and balance

7.1. turning effect of a force is moment

7.1.1. moment of force=force x perpendicular distance from point

7.1.1.1. distance=line of action of the force

7.2. balance=anticlockwise moment=clockwise moment

7.2.1. total weight=single force acting on Centre of gravity(CG)

8. Density

8.1. density=mass/volume

8.1.1. kgm-3

8.2. alcohol=800

8.3. aluminium=2700

8.4. iron=7900

8.5. lead=11300

9. Pressure

9.1. pressure=force/area

9.1.1. pascal(Pa)

9.2. liquids and gases are fluids

9.2.1. pressure acts in all directions

9.2.2. force produced is always at right-angles to the surface under pressure

9.2.3. pressure increase with depth