OCR A-Level Physics A Forces and motion overview quiz quiz

The acceleration

The average speed

The displacement

The resultant force

The horizontal velocity steadily decreases due to gravity as the projectile falls towards the ground

The vertical acceleration is zero throughout, so the projectile falls at a constant downward speed

Both the horizontal and the vertical components of the velocity accelerate at g during the flight

The horizontal velocity stays constant and the vertical motion accelerates at g

The resultant force equals the rate of change of momentum

Every action has an equal and opposite reaction acting on the other body involved

An object stays at rest, or moves at constant velocity, unless acted on by a resultant force

The total momentum of a closed system is always conserved when no external force acts

Kinetic energy

Momentum

Speed

Both kinetic energy and momentum

$1.0\ \text{N}$

$5.0\ \text{N}$

$10\ \text{N}$

$40\ \text{N}$

$P = Fs$

$P = \frac{F}{v}$

$P = \frac{1}{2}Fv^2$

$P = Fv$

The ratio of stress to strain in the linear region

The maximum stress that the material can withstand at the point where it finally breaks

The elastic strain energy that is stored in each unit of volume of the stretched material

The force needed per unit of extension, which is just the force constant of the sample

$0.40\ \text{J}$

$0.20\ \text{J}$

$2.0\ \text{J}$

$4.0\ \text{J}$

The drag force has fallen to zero, so nothing now opposes the weight of the falling object

The object is still accelerating, but it does so at a steadily decreasing rate as it falls

The resultant force is zero and the velocity is constant

The weight of the object has effectively fallen to zero once terminal velocity is reached

All of the forces acting on the object must be exactly equal in size to one another

The resultant force on the object must always point directly towards the pivot point

The moment of every individual force taken about the pivot must separately be equal to zero

The total clockwise moment equals the total anticlockwise moment about any point

$2.25\ \text{m s}^{-1}$

$0.45\ \text{m s}^{-1}$

$9.0\ \text{m s}^{-1}$

$90\ \text{m s}^{-1}$