Rank the below cases by the amount of horizontal pushing force of a person appli
ID: 1639442 • Letter: R
Question
Rank the below cases by the amount of horizontal pushing force of a person applied to the crates (all cases involve pushing the same crate in a straight path across level ground).
Pushing a crate at a constant 5 m/s.
Pushing a crate that is at rest, but just about to break loose and start moving.
Pushing a crate at a constant 3 m/s.
Pushing a crate at 5 m/s, but slowing down.
Pushing a crate at a constant 1 m/s.
5th Greatest
3rd Greatest
2nd Greatest
4th Greatest
Greatest
Pushing a crate at a constant 5 m/s.
- A. B. C. D. E.Pushing a crate that is at rest, but just about to break loose and start moving.
- A. B. C. D. E.Pushing a crate at a constant 3 m/s.
- A. B. C. D. E.Pushing a crate at 5 m/s, but slowing down.
- A. B. C. D. E.Pushing a crate at a constant 1 m/s.
A.5th Greatest
B.3rd Greatest
C.2nd Greatest
D.4th Greatest
E.Greatest
Explanation / Answer
1st greatest is -Pushing a crate that is at rest, but just about to break loose and start moving.( static friction is acting)
2nd gretest is -Pushing a crate at a constant 5 m/s.
3 rd greatest is - Pushing a crate at 5 m/s, but slowing down.
4 th greatest- Pushing a crate at a constant 3 m/s.
5th greatest - Pushing a crate at a constant 1 m/s
according to neuton second law force F is directly proportional to rate of change of momentum
if the body moving more speed more force is required. so B> A > D> C>E
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