# Homework Help: Work done by force

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1. Dec 3, 2015

### Bhumanyu Arun

1. The position x of a particle moving along x axis at time t is given by the eqn, t=(√x)+2.,where x is in m and t is in s. Find the work done by force in first 4 sec

2. W=F.s=mas

I first found out x using the given eqn nd then went blank as there was no force or mass given. But the ans is 0

2. Dec 3, 2015

### Staff: Mentor

Please keep the formatting headers in place when you post a homework problem.

Can you supply the details about work you've done so far? (show your equations) There may be some answers to your stated issues hidden in plain sight

3. Dec 3, 2015

### cnh1995

Here s is 'displacement' of the particle i.e. "change" in the value of 'x' in the equation. Does that ring any bells?

4. Dec 3, 2015

### Bhumanyu Arun

Great, got it. There ain't no displacement. Coz the initial as well as final position is 2. Thanx sir.

5. Dec 3, 2015

### Bhumanyu Arun

Thnx for clearing my stuff everyone. Hope to get ur support always

6. Dec 3, 2015

### cnh1995

Its 4 actually..But its great you got the concept!
I'm a student, probably of your age,20.

7. Dec 7, 2015

### Bhumanyu Arun

That was such a silly mistake. Well I m 2 years younger.