A body travels with a uniform speed of 3 m/s for 30 seconds, then it stops for 10 seconds and then travels at uniform speed of 2 m/s for 15 seconds. Its average speed during the motion is
Answers
Answered by
0
Answer:
2.67 m/s
Explanation:
The formula for average speed, given the speeds and time is:
(v₁t₁ + v₂t₂ + v₃t₃) / (t₁ + t₂ + t₃)
= (3*30 + 0*10 + 2*15) / (30 + 10 + 15)
= 120 / 55
= 2.18 m/s
Although if your definition of "in motion" is when it isn't in rest, instead of after motion begins, the answer changes.
The formula of average speed becomes:
(v₁t₁ + v₂t₂) / (t₁ + t₂)
= (3*30 + 2*15) / (30 + 15)
= 120 / 45
= 2.66 m/s
Similar questions