cormulas

String tension

$y{T}_{cos}=mg$

$x$Tsin$=\frac{m{v}^2}{r}$

radius $($circular motion$)r=$Lsin$$

$L-1$ length string

$T=ma$

$T=\frac{m{v}^2}{r}$

box slides without friction on the horizontal table surface. The pulley is ideal and the string has negligible mass. What is true about the tension $T$ in the string?

A$)T=10N$

B$)T=20N$

C$)T=30N$

D$)T<mn>3</mn><mn>0</mn><mi>N</mi>$

E$)T>30N$

Problems $(10$ points each$)$:

A push of magnitude $10$ N acts on a box of weight $W=15N$ as shown in the figure. The push is directed at an angle $=30$ degrees, below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box.

Identify the forces acting on the box.

What is the magnitude of the normal force from the surface on the box?

What is the magnitude of the friction force on the box due

A push of magnitude $10$ N acts on a box of weight $W=15N$ as shown in the figure. The push is directed at an angle $=30$ degrees, below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box.

Identify the forces acting on the box.

What is the magnitude of the normal force from the surface on the box?

What is the magnitude of the friction force on the box due $t$