mechanics question..

physics1988

A duck has a mass of 2.5kg. As the duck paddles, a force of 0.1N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.2N in a direction 52 south of east. When these forces begin to act, the velocity of the duck is 0.11m/s in a direction due east. Find the magintude and direction (relative due east) of the displacement that the duck undergoes in 3.0s while the forces are acting..

Need help. Tried, but failed.

Thanks.

Reply 1

Game_boy

I have a solution, but in the interests of your learning I'm not going to post it until you've made some attempt at it.

First, find the resultant force in the i and j directions by adding the force vectors.

Second, use F=ma to calculate the acceleration in those directions.

Third, using the acceleration and initial velocity, use a suvat equation to calculate the distance travelled in each direction.

Finally, determine the magnitude and direction of the displacement vector.