Question

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds.

Answer 1

Acceleration is defined as the rate of change of velocity, which, simply put, is a mouthful to describe how fast something speeds up, slows down, or turns. The equation for acceleration is

a = Δv / Δt,

or your final velocity - your starting velocity, then divided by the amount of time. It can also be expressed as

a = (Vf - Vi) / t,

Where Vf is your final velocity, Vi is your initial velocity, and t is the time traveled.

The question gives us that the helicopter moves from a starting velocity of 30 m/s to a final velocity of 40 m/s in the span of 5 seconds. This means we can fill in the variables to the equation, where

Vf = 40,
Vi = 30, and
t = 5.

Plug these known variables into the original equation, and we get

a = (Vf - Vi) / t = (40 - 30) / 5.

From here, the answer comes down to 10 / 5, or 2 m/s^2.

Hope this helps! If you have any questions, don't hesitate to ask :D

Answer 2

Hey Queens!..... and kings:)

the answer is 2