Question

A particle moving along a straight – line has negative acceleration. That means it :

(i) Must be slowing down. (ii) May be slowing down

(iii) May be speeding up

Correct statements is/are :

• A. (i) only
• B. (ii) only
• C. (iii) only
• D. (ii) and (iii)

Answer 1

Answer: (D)

(ii) and (iii)

Answer 2

Negative acceleration mean it is along negative direction. If velocity is along positive direction, then particle will slow down, and if velocity is along negative direction, particle will speed up. (Decelaration and retardation both mean slowing down)