- #1

paulimerci

- 287

- 47

- Homework Statement
- Assuming constant velocity, for which case would the applied force be greater?

- Relevant Equations
- F = ma

If F is applied at an angle above the horizontal, it decreases the normal force and vice versa.

So in

net force along X = F applied cos theta - friction

since the object is moving with constant velocity, a = 0 and so the above equation becomes

F applied cos theta = friction

Now along the y axis,

net force along Y = N + F applied sin theta - mg

Since the object is not moving vertically F net in the y direction is taken zero,

0 = N + F applied sin theta - mg

N = mg - F applied sin theta

Similarly for

From the equations above for normal force we can say that F applied is greater for case B than case A. Is my solution right?

So in

**case A**,net force along X = F applied cos theta - friction

since the object is moving with constant velocity, a = 0 and so the above equation becomes

F applied cos theta = friction

Now along the y axis,

net force along Y = N + F applied sin theta - mg

Since the object is not moving vertically F net in the y direction is taken zero,

0 = N + F applied sin theta - mg

N = mg - F applied sin theta

Similarly for

**case B,**

N = mg + F applied sin thetaN = mg + F applied sin theta

From the equations above for normal force we can say that F applied is greater for case B than case A. Is my solution right?