Answered

Get comprehensive solutions to your questions with the help of IDNLearn.com's experts. Discover in-depth answers from knowledgeable professionals, providing you with the information you need.

A car starts from rest and accelerates uniformly to reach a speed of 21 m/s in 7.0 s. What was the speed of the object after 2.0 seconds?

Sagot :

Answer:

6 m/s

Explanation:

Well we can find acceleration a=v/t = (21-0)/7=3 m/s^2

vf=at+v0, use this equation to solve for the vf

vf=3(2)+0=6 m/s was its speed at 2s

Thank you for using this platform to share and learn. Keep asking and answering. We appreciate every contribution you make. Thank you for choosing IDNLearn.com for your queries. We’re here to provide accurate answers, so visit us again soon.