Question

when an object undergoes a
acceleration
(a) the speed always increases
(b)It falls towards the earth
(c)It velocity always increases
(d)A force must- be acting on it​

Answer 1

Answer:

d) a force must be acting on it

then the velocity/ speed of an object can increase or decrease. If a force acts on object then it accelerates. hence option (D) A force always acts on it is the correct answer.

Answer 2

Answer:

d) A force must be acting on it

Explanation:

Because when an object undergoes acceleration its speed /velocity can increase or decrease...

Also F = ma [Newton's 2nd law]

i.e if a force acts on an object then it accelerates, so option d) is the correct answer to this question...

Hope it helps...:))