Question

Q2. A roller of radius r = 300 mm and weight 2000 N is to be pulled over a curb of height 150
mm (see Fig. 1) by a horizontal force P applied to the end of a string wound tightly around
the circumference of the roller. Find the magnitude of P required to start the roller move
over the curb​

Answer 1

The magnitude of the P required to start the roller move over the curb​ is 1155.6 N

Explanation:

We are given that:

The radius of roller "r" = 300 mm

Weight of roller "w" = 2000 N

Height "h" = 150 mm

To Find = The magnitude of P  

Solution:

Magnitude of P = JOAR - op2

P = ?

(300 + 150) + 2000 x 260 = 0  

P = 1155.6 N

Thus the magnitude of the P required to start the roller move over the curb​ is 1155.6 N