Question

Saat t=1s berada di P(2,4) dan pada saat t=3s berada di Q(8,12) .besar perpindahan? dan kecepatan rata2?

Answer 1

Δr = rp-rq
-> (2i+4j) - (8i+12j) = -6i - (-8j) = -6i + 8j
|Δr| = √6+8 = 10 besarv perpindahan...

Answer 2

Delta x = 8-2 = 6
delta y = 12-4 = 8
besar perpindahan = √6kuadrat+8kuadrat = √36+64 = √100 = 10

v= 10:(3-1) = 10:2 =5