# Shared Flashcard Set

## Details

P2
AQA
10
Physics
10/28/2011

Term
 What is the equation to calculate speed?
Definition
 speed (m/s) = distance travelled (m)                     time taken (s)
Term
 What is the equation that calculates acceleration?
Definition
 acceleration (m/s ) =  change in velocity (m/s)                                       time taken for the change (s)
Term
 [image]
Definition
 Distance = Speed x Time   Time = Distance           Speed   Speed = Distance            Time
Term
 What is the unit of force?
Definition
 Newtons (N)
Term
 What is a resultant force?
Definition
 It is a single force that has the same effect as all of the forces acting on the object.   Eg. When the resultant force is 0, the object is either stationary (if it was at rest) or it continues to move at the same speed and in the same direction if it was already moving Eg. When the resultant force is not 0, the movement of the object depends on the size and direction of the resultant force.
Term
 What is the equation that links the resultant force, mass and acceleration together?
Definition
 resultant force (N) = mass (kg) x acceleration (m/s )
Term
 What is the equation for the stopping distance?
Definition
 stopping distance = thinking distance + braking distance
Term
 What is the correct equation for momentum?
Definition
 momentum = mass x velocity
Term
 What is terminal velocity?
Definition
 When the object reaches a constant velocity, as the drag force on it is equal and opposite to its weight.   Eg. Object falls at a steady pace now, so it has reached its terminal velocity
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