Question

determine a aceleraçaõ para
a- v=50 m/s vo=20m/s 10 s
b-v=120 m/s vo=80 m/s 200 s
c-v=120 km/h vo=20 km/n 15 min
d- v=75 km/h vo=25 km/h 5 h

Answer 1

vo = 20m/s

v = 50 m/s

t = 10 s

a = Δv/Δt

a = (50 - 20)/10

a = 30/10

a =  3 m/s²

vo=80

v=120 m/s

t= 200 s

a = Δv/Δt

a = (120 - 80)/200s

a = 40/200

a = 0,2 m/s²

vo=20 km/h

v=120 km/h

t = 15 min => 0,25h

a = Δv/Δt

a= (120 - 20)/0,25

a = 100/0,25

a = 400km/h²

vo=25 km/h

v=75 km/h

t = 5h

a = Δv/Δt

a = (75 - 25)/5

a = 50/5

a = 10 km/h²