Posted by **John** on Sunday, November 25, 2012 at 2:27pm.

A duck has a mass of 2.70 kg. As the duck paddles, a force of 0.130 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.210 N in a direction of 52.0 ° south of east. When these forces begin to act, the velocity of the duck is 0.110 m/s in a direction due east. Find (a) the magnitude and (b) the direction (relative to due east) of the displacement that the duck undergoes in 2.70 s while the forces are acting. (Note that the angle will be negative in the south of east direction.)

- physics -
**bobpursley**, Sunday, November 25, 2012 at 3:22pm
Neglecting friction? I have never understood why competent teachers give problems such as this

I assume your teacher imagines there is no friction, but the current gives a force? What exactly is friction?

anyway, add the force vectors, get the resultant, then compute a=Force/mass, and assume any other friction in the water besides the current is magically not there.

Now knowing a, you can compute displacement

d=vi*t+1/2 a t^2

## Answer This Question

## Related Questions

- physics - A duck has a mass of 2.9 kg. As the duck paddles, a force of 0.07 N ...
- physics - A duck has a mass of 2.2 kg. As the duck paddles, a force of 0.11 N ...
- Physics - A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N ...
- Physics - A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N ...
- physics - A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.07 N ...
- Physics please help - A duck has a mass of 2.8 kg. As the duck paddles, a force ...
- physics - A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N ...
- Physics - A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.08 N ...
- physics 213 - A duck has a mass of 2.80 kg. As the duck paddles, a force of 0....
- Physics - A boat has a mass of 6800 kg. Its engines generate a drive force of ...

More Related Questions