Question

Ram is trying to move a box by pushing it at an angle $\theta$ with a force F${}_1$ (fig 1) while Avinash is trying to move the same box by pulling it with force F${}_2$ (fig 2). Who will have to apply a greater force in order to just move the box. Coefficient of static friction is ($\mu$${}_s$) and coefficient of Kinetic friction. $\mu$${}_k$

• A. F = F
• B. F > F
• C. F < F
• D. None of these

Answer 1

The correct option is B

F > F

We can see that,

F${}_1$ > F${}_2$

In order to move the block

The force required to push down at angle is much more than the force required to pull up at the same angle.