# Physics on the go Mechanics Section 1

This covers Equations of motion, Graphs, Scalar and Vector quantities and Projectiles

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- Created by: Edward
- Created on: 28-12-12 10:55

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- Mechanics Section 1
- Scalar
- A quantity that only requires magnitude, no direction
- Examples include mass, temperature, time

- Vector
- A quantity that requires both direction and magnitude
- Examples include acceleration, force, velocity
- Use pythagoras to find resultant force
- Find angle of the force using either sin or cos
- Inside angle is cos, outside is sin

- Equations of motion
- SUVAT
- V=final velocity (ms^-1)
- U=initial velocity (ms^-1)
- A=acceleration (ms^-2)
- S=displacement (m)
- T=time (s)

- V^2=U^2+2AS
- S=0.5(V+U)T
- A=(V-U)/T
- S=UT+0.5AT^2

- SUVAT
- Projectile motion
- At an angle
- Resole horizontally and vertically, use the vertical component to find time and height, use the horizontal component to find out the distance travelled whilst in the air

- Vertical
- Use equations of motion
- Horizontal
- At an angle
- Resole horizontally and vertically, use the vertical component to find time and height, use the horizontal component to find out the distance travelled whilst in the air

- Use equations of motion
- Horizontal

- At an angle
- Free fall
- The motion of an object undergoing the acceleration of gravity
- Gravity=9.81ms^-2

- The motion of an object undergoing the acceleration of gravity
- Displacement-Time graphs
- Gradient gives velocity
- If graphs is curved it means object is accelerating/ decelerating
- To find velocity draw a tangent

- If linear, velocity is constant
- Using ICT to draw graphs
- Data is more accurate
- Data displayed in real time
- Higher sampling rate than human

- Velocity-Time graphs
- Gradient gives the acceleration
- Distance travelled equals area
- Using ICT to draw graphs
- Data is more accurate
- Data displayed in real time
- Higher sampling rate than human

- Scalar

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