# Answer on Mechanics | Relativity Question for einstein

Question #26000

an object start from rest with a constant acceleration 8 m/(s2 ) along a straight line find A- the speed at the end of 5 s B-the average speed for the 5s interval c-the distance traveled

Expert's answer

1) for uniformly accelerated motion

v=v0+at, v0 - initial velocity, a - acceleration, t- time

v=0+8*5=40 (m/s)

2) for uniformly accelerated motion

u=(v0+v1)/2, u - average speed, v0 - initial speed, v1 -final speed

u=(0+40)/2=20 (m/s)

3) for uniformly accelerated motion

s=v0t+at^2/2

s=0*t+8*25/2=100 (m)

v=v0+at, v0 - initial velocity, a - acceleration, t- time

v=0+8*5=40 (m/s)

2) for uniformly accelerated motion

u=(v0+v1)/2, u - average speed, v0 - initial speed, v1 -final speed

u=(0+40)/2=20 (m/s)

3) for uniformly accelerated motion

s=v0t+at^2/2

s=0*t+8*25/2=100 (m)

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