chapter 3 - motion Flashcards
what is instantaneous speed
speed over a very short interval of time
define acceleration
rate of change of velocity
what is the gradient of a displacement time graph?
velocity
what is the gradient of a velocity time graph?
acceleration
area under a velocity time graph is equal to _____
displacement
what are the 5 suvat equations?
s= vt - 0.5 x a x t^2 s= ut + 0.5 x a x t^2 s= 0.5 x (u+v) x t v = u + at v^2 = u^ + 2as
what is the thinking distance?
the distance travelled between moment when you first see stimulus to moment you break
define breaking distance?
distance from when break is applied to when the car is at rest
what affects stopping distance?
road conditions, drugs, tire conditions, speed of car
how to measure gravity using metal ball
drop ball from electro magnet to trapdoor attached to timer. once electromagnet releases ball timer starts and when hits trapdoor , stop timer. measure time it took to fall a set distance and then plug into formula
s=0.5 x a x t^2 to work out a of free fall
how does the assumption of no air resistance effect projectile motion?
- vertical velocity changes due to acceleration
- vertical displacement can be calculated using suvat
- horizontal motion remains constant
when a particle is shot upwards how do you know its highest point?
when velocity = 0
how do you calculate the horizontal and vertical components of a projectile shot at angle Q ?
horizontal = u cos Q vertical = u sin Q
