equations - P9

• Speed = distance / time (m/s)
• Weight (N ) = mass (Kg) x gravitational field strength (N/Kg)

  W=M x G

  W

  M G
• Hooks law force (N)

  Spring Constant (NM-1) x extension (M)

  F= K x E

  F

  K E
• Work done (J) = force (N) x distance (M)

  W=F x D

  W

  F D
• GPE = M x G x H
• Average speed = total distance/total time
• E -Equation

  R- Rearrange

  I- Input values

  C- calculate

  W- with

  U- units
• velocity - the speed of an object in a given direction, measured in metres per second (m/s)
• speed gives you a rate of movement - scalar quantity
• velocity gives you speed and direction
• Accelerating - the curve is a positive gradient
• Constant speed - line is straight, traveling upwards
• decelerating - curved, changing speed, curved gradient
• stationary - line is flat
• Speed / velocity = m/s
• acceleration - m/s squared
• The straight gradient represents a constant acceleration or deceleration
• Acceleration = change in speed / change in time
• let u - initial speed
• let v - final speed
• change in speed = final speed - initial speed
• Acceleration = (y-u)/t
• to work out distance travelled -m

  find area of rectangle and triangle and add together
• a vector is a quantity with size and direction