Question

State whether following motions show acceleration or
retardation ?
(i) Brakes are applied on moving car to stop the car.
(ii) A car gains the speed from 30 km/hr to 60 km/hr.
(iii) A stone is dropped from the top of a building.
(iv) A stone is thrown vertically up.
(v) A rocket is fired with its engine on.​

Answer 1

Explanation:

a) Retardation

b) Acceleration

c) Acceleration

d) Retardation

e) Acceleration

Answer 2

Answer:

(i) Brakes are applied on moving car to stop the car.-Retardation

(ii) A car gains the speed from 30 km/hr to 60 km/hr.-acceleration

(iii) A stone is dropped from the top of a building.-acceleration

(iv) A stone is thrown vertically up.-Retardation

(v) A rocket is fired with its engine on.- acceleration

Explanation:

hope that helps you