A particle has initial velocity 10 m s⁻¹ and moves under a constant retarding acceleration 5 m s⁻² along the line of motion. Which statements are correct?
Select all that apply

Question

A particle has initial velocity 10 m s⁻¹ and moves under a constant retarding acceleration 5 m s⁻² along the line of motion. Which statements are correct?

G1 Physics · Accepted Answer

With u=10 m s⁻¹ and a=-5 m s⁻², stopping time is 2 s and maximum forward displacement is u²/(2×5)=10 m, so A is true. In the first 3 s the particle travels 10 m forward, then 2.5 m backward during the next 1 s, giving total distance 12.5 m. Hence C is also true. Correct: A,C.