Question

Both car a and car b leave school at the same time, traveling in the same direction. car a travels at a constant speed of 74 km/h, while car b travels at a constant speed of 90 km/h. how far is car a from school 1.5 h later? answer in units of km.

Answer 1

Δs=24 km

Step-by-step explanation:

vA=74km/h

vB=90km/h

tA=tB=1,5h

Δs=?

sA=vA*tA

sB=vB*tB

Δs=sB-sA

Δs=vB*tB-vA*tA, tB=tA=t

Δs=t*(vB-vA)

Δs=1,5h*(90km/h-74km/h)

Δs=1,5h*16km/h

Δs=24 km