Question

A motorcycle start from rest and uniformly accelerate at 1m/s sq . Find the distance travelled in 3rd srcond.

Answer 1

Use second equation of motion and subtract the distance covered in 3s to that in 2s.${d}_{{3}^{rd} \text{second}}\\={s}_{3s}-{s}_{2s}\\=\frac{1}{2}\cdot1\cdot3^2-\frac{1}{2}\cdot1\cdot2^2\\=\frac{5}{2}=2.5 m$