Question

Priviți poza va rog mult.​

Answer 1

vmx=Δx/Δt=(x(t+Δt)-x(t))/Δt=((t+Δt)²-t²)/2Δt=t-Δt/2

Δt->0=>vx=t=2 m/s

vmy=Δy/Δt=(y(t+Δt)-y(t))/Δt=((t+tΔ)-t)/Δt=Δt/Δt=2/2=1 m/s=>vy=1 m/s

v=√(vx²+vy²)=√(2²+1²)=√5=2,23 m/s