P2 - Forces and Motion - Year 11
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What is the SI unit for distance?
metre, m
What is the SI unit for mass?
kilogram, kg
What is the SI unit for time?
second, s
What is the unit for force?
newton, N
Name six vector quantities
Displacement, velocity, acceleration, force, weight, momentum
Name four scalar quantities
Distance, speed, mass, energy
What is the equation for speed?
Speed = distance / time
How can you calculate speed from a distance-time graph?
The gradient
What does a horizontal section of a distance-time graph mean?
The object is not moving
What is the equation for acceleration?
Acceleration = change in velocity / time taken a = ( v -u ) / t
What does the gradient of a velocity-time graph tell you?
acceleration
What is the unit for acceleration?
metres per second squared, m/s²
What is the unit for speed?
metres per second, m/s
What is the unit for velocity?
metres per second, m/s
What does the area under a velocity-time graph tell you?
Distance travelled
What does a horizontal section of a velocity-time graph represent?
Constant velocity
What is the value of g?
10 m/s²
What is Newton’s first law?
Objects accelerate in the direction of the resultant force
What is Newton’s second law?
F = m x a or F = (mv - mu) ÷ t
What is the equation for weight?
Weight = mass x gravitational field strength
What is the equation for momentum?
Momentum = mass x velocity
What is Newton’s third law in relation to equilibrium situations?
Every action has an equal and opposite reaction
What is Newton’s third law in relation to collisions?
Total momentum before a collision equals total momentum after a collision
What is the equation for stopping distance?
Stopping distance = thinking distance + braking distance