Force and motion

Classical Mechanics Level 1

True or false :

$\quad$ If an object is moving, then a net force must be acting on it.

False True

5 solutions

Akhil Bansal
Feb 27, 2016

An object moving with a constant velocity(zero acceleration) has net force zero.

Can we also give an example where the object is actually at rest but from our frame which is in motion it appears to move but in that case also we can't say that a force acting on it because it's not moving, we are.

Kushagra Sahni - 5 years, 3 months ago

I guess up you are talking about relative motion but here we are discussing different topic.

Ayusha Sapkota - 1 month, 1 week ago

Is kinetic energy not regarded as a force?

Jose Bessa - 4 years, 9 months ago

Kinetic energy is the energy required to push an object to a certain velocity Ke = 1/2 × m(V2-V1)^2

Harsha Vardhan palagiri - 1 month, 1 week ago

Where has 'constant velocity' been mentioned?

Anagha Gokul - 2 years, 9 months ago

Typically my answer would be without more variables known; an accurate answer cannot be given at this time.50/50 guess at best

Rico Fielder - 2 years, 3 months ago

Arbitrary object moving along must have force acting it to overcome opposing forces to keep going at constantly at same spd.

Pat Butler - 1 year, 4 months ago

Constant velocity has a net force of zero meaning no acceleration and no change in speed and direction which are variables of this resuly

Sajan Baral - 8 months ago

Aniruddha Bagchi
May 1, 2016

Recently , a planet named Lubricon VI has been discovered far away in the cosmic soup , which is supposed to have no atmosphere so no air drag and also has a very even surface throughout with frictionless material called lubrica so no resistance too. There these type of questions will have their true meaning.

Harsha Vardhan Palagiri
May 6, 2021

Galileo once released a rough object on a inclined plane (<5°) and that object stopped after travelling some distance, he thought it was obvious. But few minutes later he smoothened that rough object and he again released from that inclined plane. but now it travelled much farther and he again repeated doing that by smoothening it more and he finally found that there is something fishy about aristotle's laws of motion😂

Roy Satyam
Nov 27, 2017

Uniform velocity i.e in uniform motion no net force is required

What about forces acting against this object.

Pat Butler - 1 year, 4 months ago

Tejas. S
Feb 2, 2017

Perpetual motions doesn't require force.

Force and motion

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