Question

Which one requires greater force: (i) to generate motion in a body of mass ‘m’ from 0 to ‘v’ in time ‘t’; or (ii) to generate motion in a body of mass ‘2m’ from 0 to ‘2v’ in time ‘4t’.Will mark as brainliest if answered correctly...

Answer 1

dont know the answer, sorry

Answer 2

Answer:

Centre of mass:

It is the point where whole mass of the body is concentrated. If an external force is applied on COM , it torque will be zero.

Centre of gravity:

It is the point where the torque of gravitational force is zero.

COM and CAG mag or mag not coincides

couple only produces rotation, no translation

Mechanical advantage = output/input

Input force

output force

If it is grater than 1

Output > 1 input

So, less effort is required to lift large low

Explanation:

hope this helps