P1 Flashcards
What is used to measure very small distances?
micrometer screw gauge
Speed formula
total distance / total time
Define acceleration
change of velocity / total time
Acceleration is the…
gradient of a speed-time graph
Acceleration of a free fall g for a body near to the Earth is _________.
constant
What do you calculate to find the distance travelled for motion with constant acceleration.
the area under a speed–time graph
Define speed
a measure of how fast an object is moving
Earth is the source of a ___________________.
gravitational field
Define weight
W=mg
g=10N/kg
Define mass
m=W/g
The mass of a body is the _____________ in it, whereas the weight of a body is the _____________________ acting on it.
amount of matter, measurement of gravitational force
Define velocity
speed in a specific direction
same formula as speed but uses + and - signs to identify whether it is accelerating or decelerating
When something speeds up/slows down, it is:
accelerating/decelerating
3 fundamental effects of force
change in shape, size, motion(velocity)
Newton’s 2nd law of motion:
Resultant Force applied =
Mass of object X acceleration of object
F(N) = m(kg) x a(ms^-2)