Question

2.When an object undergoes acceleration a]there is always an increase in its velocity b]there is always an increase in its speed c] a force always acting on it d]all of the above

Answer 1

Correct option is (C) a force is always acting on it
explaination
Take all option one by one
option (a) Acceleration is rate of change in velocity not increase in velocity hence (a) is false
option (b) a body can remain in acceleration when it change its direction of motion with constant speed example is uniform circular motion,hence option (b) is wrong
option (C) ,as by formula F=ma means body can remain accelerated until there is applied force,option (c) is correct

Answer 2

Answer is is (C) a force is always acting on it