Skip to content
Login Register

Practice question

MCQ

Question

A car accelerates from 5m/s at 2m/s2 for 6s, then moves at constant speed for 3s. What is the average speed over this time?

Options

Choose one · Correct answer highlighted

Explanation

Phase 1: v=5+2⋅6=17m/s, x1=5⋅6+12⋅2⋅(6)2=30+36=66m. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 13 m/s as the result, so option C is correct.

Related blogs

Guides and insights connected to this topic