BRAINCAKEMomentum
Revision notes for Momentum in OCR Physics A (H156). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Newton's First Law of Motion.An object will remain at rest or continue to move at constant velocity unless acted on by a resultant force.
- Newton's Second Law of MotionThe resultant force acting on an object is directly proportional to the rate of change of momentum and is in the same direction.
- Newton's Third Law of MotionNewton's third law is about the interaction between objects.
- The Four Fundamental Forces• The four fundamental forces are: • the gravitational force • the electromagnetic force • the strong nuclear force • the weak nuclear force The…
- Linear MomentumThe linear momentum of an object is its mass × its velocity. p=m v Two objects can have the same momentum if the products of their mass and velocity…
- Conservation of MomentumThe principle of conservation of momentum states that: For a system of interacting objects, the total momentum in a specific direction remains…
- Explosions vs CollisionsA gun recoils when a bullet is fired.
- Elastic and Inelastic CollisionsThere are two types of collisions: perfectly elastic and inelastic.
- Air BagsAir bags are fitted in cars to reduce the injury by collision with the steering wheel, dashboard or windscreen.
- Conservation of Momentum as a Consequence of Newton's LawsWhen two objects interact they experience an equal and opposite force.
- Impulse and Force-time GraphsNewton's second law states that the resultant force on an object equals its rate of change of momentum, F = Δp/Δt.
- Adding MomentumSince linear momentum must be conserved and momentum is a vector quantity, the vector sum of the initial momentum must be equal to the vector sum of…
- Resolving MomentumMomentum is a vector, so like any vector it can be split into two perpendicular components.
- Conservation of Momentum in Two DimensionsThe principle of conservation of momentum applies in two dimensions as well as one.
On the specification
- 3.5.1 Newton's laws of motion
- 3.5.2 Collisions