Physics! URGENT HELP ASAP PLEASE

[smileurdentist]

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hey guys... I need your help today

Q1/
Two forces, F1 and F2 , act on the 7.00-kg block shown in the drawing. The magnitudes of the forces are F1=70.2 N and F2=21.3 N. Take the positive direction to be to the right. Find the horizontal acceleration of the block, including sign. I GOT THE ANSWER FOR THIS ONE... PLEASE HELP FOR THE NEXT ONE!

Q2/
A duck has a mass of 2.40 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.190 N in a direction of 47.0 ° 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 3.90 s while the forces are acting. (Note that the angle will be negative in the south of east direction.)



PLEASE HELP AS SOON AS POSSIBLE TODAY

Thanks in advance

 

[ClemsonFirst]

Q1 - so you have to sum the forces in the horizontal direction. Gravity is not at play because it is vertical and the sin component of F1 is not in at play because it is vertical. So the only other forces are F2 and the cosine component of F1. F2 will be negative because it is to the left and F1 is to the right so it is positive.

Find the cos component of F2 and then add the two and you will have your answer.

Q2
So we have an initial velocity, and velocities in the x and xy direction. You have to find the displacement in the x direction and the y direction separately. These will make two sides of a triangle. Now find the hypotenuse and you will have the total displacement.

 

[Saint Fu]

Like Clemson said, break everything down into x and y first, including the forces. Since you have force and mass (of the duck), you can calculate acceleration. Now you have acceleration and initial velocity, so you can calculate displacement.