Newton Hofsteider's user avatar
Newton Hofsteider's user avatar
Newton Hofsteider's user avatar
Newton Hofsteider
  • Member for 2 years, 11 months
  • Last seen more than 2 years ago
8 votes
7 answers
4k views

Why doesn't energy exhaust itself?

3 votes
2 answers
589 views

Are all oscillatory motions periodic motions?

2 votes
1 answer
131 views

The reaction force of a normal force

1 vote
2 answers
37 views

Is wave motion the combined motion of the disturbance and the medium?

1 vote
4 answers
869 views

Does gravitational force do work onto an object being lifted?

1 vote
3 answers
297 views

Is the $d$ in $W=F*d$ displacement or distance?

0 votes
2 answers
259 views

Internal force and centre of mass

0 votes
1 answer
93 views

External forces and Internal forces

0 votes
3 answers
193 views

Can internal forces do work onto object(s) in a system? [duplicate]

0 votes
2 answers
900 views

Why can other people lift you up but you can't lift yourself up? [duplicate]

0 votes
2 answers
295 views

Will the position of the Centre of Mass remain unchanged?

0 votes
3 answers
660 views

Potential energy is caused by what force?

0 votes
1 answer
778 views

Relationship between conservative and non-conservative forces with internal and external forces

0 votes
5 answers
558 views

Why does potential energy of an object increase as we lift an object?

0 votes
2 answers
261 views

How is energy lost?

0 votes
4 answers
576 views

Transfer of energy

0 votes
3 answers
53 views

Object moving from up to down and stopped midair

0 votes
2 answers
488 views

Phase difference of a periodic wave

-1 votes
3 answers
509 views

Can a non-conservative force be an internal force of a system?