Question

Study the velocity-time graph of a travelling metro train as shown in the

figure. What is the acceleration of the train?

a. During the first two seconds

b. Between the second and tenth seconds

c. During the last two seconds.​

Answer 1

Explanation:

$a):a = \frac{ Δv}{Δt} = \frac{20 - 0}{2 - 0} = \frac{20}{2} \\ \boxed{ a= 10 \: m {s}^{ - 2}} \\ \blue{ \rightarrow \: acceleration} \\ b) : a = \frac{ Δv}{Δt} = \frac{20 - 0}{10 - 2} = \frac{20}{8} \\ \boxed{a = 2.5 \: {ms}^{ - 2} } \\ \blue{ \rightarrow \: constant \: acceleration}\\ c) : a = \frac{ Δv}{Δt} = \frac{0 - 20}{12 - 10} = \frac{ - 20}{2} \\ \boxed{a = - 10 \: {ms}^{ - 2} } \\ \blue{ \rightarrow \: retardation} \\ \\ \red{\mathfrak{\underline{\large{Hope \: It \: Helps \: You }}}} \\ \green{\mathfrak{\underline{\large{Mark \: Me \: Brainliest}}}}$

Answer 2

Answer:

The train's acceleration is in first two second