motion

Question 1

condition for a body to be in translational equilibrium

Answer 1

the resultant force on the body in any direction is zero

Question 2

instantaneous speed

Answer 2

speed of an object at a specific point, instant

Question 3

to calculate instantaneous speed

Answer 3

draw a tangent and find the gradient

Question 4

gradient of the tangent of a distance or displacement/time graph?

Answer 4

gives the instantaneous speed

Question 5

gradient of the tangent of a speed or velocity/time graph?

Answer 5

gives the instantaneous acceleration

Question 6

gradient of an acceleration time

Answer 6

gives the rate of change of acceleration

Question 7

if no air resistance, motion is.. (4 points)

Answer 7

symmetrical, with a constant horizontal velocity, a changing vertical velocity with constant vertical acceleration. Parabolic motion

Question 8

formula for range

Answer 8

Sx = Ux x t

Question 9

to find time of flight:

Answer 9

V= u + at (or considering V up, V= u -gt)

Question 10

to find max height

Answer 10

Vˆ2= Uˆ2 + 2as
note: V = 0 at max height

Question 11

to find velocity after a given time

Answer 11

v = u-gt (to find vertical)

then use Pythagoras to resolve using horizontal component which is always constant and vertical component

Question 12

to find angle

Answer 12

tan-1 of Vy/Vx