BRAINCAKENewtons Laws of Motion
Revision notes for Newtons Laws of Motion in AQA Physics (7407). 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 MotionNewton's first law states that an object remains at rest, or continues to move at constant velocity, unless it is acted on by a resultant force.
- Investigating Force and MotionInvestigating the relationship between the resultant force and Motion can be done using a dynamics trolley and motion sensor connected to a computer.
- Newton's Second Law of MotionFor constant mass ΣF = m a The acceleration of an object is proportional to the resultant force ΣF acting on the object. ΣF α a By defining the…
- WeightW = m g W = weight (newtons) m = mass (kg) g = gravitational field strength On the Earth's surface the gravitational field strength g is 9.81ms-2…
- Resultant ForcesThe resultant force on an object is the single force that has the same effect as all the forces acting on it together.
- Sliding Down a SlopeThe forces acting on an object on a slope are the normal contact force N which is perpendicular the plane of the slope, the weight W of the object…
- Object Falling in a FluidAn object falling in fluid experiences an upward drag force due to fluid resistance and upthrust.
- Terminal SpeedAn object falling in fluid experiences an upward drag force due to fluid resistance and upthrust.
- Motion of a Powered VehicleAir resistance increases with speed.
- Stopping DistanceStopping distance = thinking distance + braking distance When a car is moving it takes a certain amount of time to stop the car if an obstacle or…
- Thinking DistanceThe thinking distance is the distance a vehicle travels during the driver's reaction time, from the moment the driver sees a hazard to the moment…
- Braking DistanceThe braking distance is the distance the vehicle has travelled from the time the brakes are applied to the time it stops.
- Practical: Measuring FrictionFriction can be measured by placing a block on a table and pulling it with increasing force until it moves.
- Impact ForceAccording to Newtons second law the impact force during a collision is equal to the mass multiplied by the deceleration of the object F = m a The…
- Contact Time and Impact TimeThe contact time is the time for which two colliding objects are in contact with each other.
- Car SafetyMost of the safety features in a car increase the impact time and consequently reduce the impact force.
On the specification
- 3.4.1.5 Newton's laws of motion