PHYSICS

• Speed triangle

  A) D

  B) T

  C) S

  
• The distance covered by object X during time interval over the time interval is always constant.
• Energy is measured in joules (J)
• Potential energy is the energy stored in an object due to its position or shape.
• Kinetic energy is the energy of a moving object.
• Gravity = 9.8 m/s^2
• Potential energy = mass x gravity x height (m x g x h)
• Kinetic energy = 1/2 x mass x velocity^2
• If height is not given, use the formula for kinetic energy to solve for potential energy (KE=PE)
• Work is measured in joules (J) and newton-metre (N-m)
• Work = force x distance
• Reflection is the change in direction of light at an interface in between two different media.
• angle of incidence = angle of reflection
• For diagonal displacement, use the Pythagorean theorem.
• Conservation of momentum formula

  Pi = Pf

  M1U1 + M2U2 = M1V1 + M2V2
• M1V1 + M2V2 = (M1 + M2)(Vf)
• The center of mass is the average position of all the particles in an object