Year 10 Flashcards
What is the equation used to determine weight?
Weight (N) = mass (kg) x gravitational field strength (N/kg)
An astronaut has a mass of 70 kg, what do they weigh on Earth?
700N
What is Earth’s gravitational field strength?
10 N/kg (technically 9.8)
What is the Moon’s gravitational field strength?
1.6 N/kg
What does a 100kg astronaut weigh on the moon?
160 N/kg
What is the gradient of a distance-time graph?
Speed.
What is the gradient of a speed-time graph?
Acceleration.
What is the gradient of an acceleration-time graph?
The jerk.
What is the gradient of a jerk-time graph?
The snap or jounce.
What is Newton’s second law?
F = ma
What is the equation for a straight-line graph?
y = mx + c
What is stopping distance?
Thinking distance + braking distance
What factors affect thinking distance?
Condition of driver (DUI, etc.), visibility, speed of approaching object.
What is the change in momentum called
Impulse
Momentum equation
p = mv
a symbol?
Acceleration
s symbol in physics?
Displacement (distance)
In maths: d = st
In physics: s = vt
Equation for force
F = ma
Equation for change in velocity with constant acceleration
v^2 = u^2 + 2as
Equation for acceleration
a = (v - u) / t
Remember in the test
write in detail.
Define a Sankey diagram
an efficiency diagram - wasted coming out the bottom, useful continuing along the top
efficiency formula
efficiency (%) = (output / input) x 100