As per the request, from IGCSE Physics by Tom Duncan & Heather Kennett.
Moments and lever
Pg 62
Q1.
Ans : M x 50 = 100 x 40
Explanation : According to Law of moment
Q2.
(i) 25 x 0.2 = 5 Nm -- picture (c )
(ii) 0 -- picture ( A )
(iii) between 0 and 5 Nm -- picture (B)
Q3
a. (i) Weight of the shelf = mass x gravitational force
= 0.15 x10
W= 1.5 N
(ii) From the center of mass , the shelf weight will be acting in a downward direction.
(iii) The force will be acting in upward direction
(iv) Distance from the rope force = 0.4 m
W x 0.2 = upward forces x 0.4 m
1.5 x 0.2 ÷0.4 = upward forces
upward forces = 0.75 Nm
b .
(I) If the weight on the shelf increases , tension will increase.
(ii ) By determining the actual weight of the shelf and its stability to hold tension.
Moments and lever
Pg 62
Q1.
Ans : M x 50 = 100 x 40
Explanation : According to Law of moment
Q2.
(i) 25 x 0.2 = 5 Nm -- picture (c )
(ii) 0 -- picture ( A )
(iii) between 0 and 5 Nm -- picture (B)
Q3
a. (i) Weight of the shelf = mass x gravitational force
= 0.15 x10
W= 1.5 N
(ii) From the center of mass , the shelf weight will be acting in a downward direction.
(iii) The force will be acting in upward direction
(iv) Distance from the rope force = 0.4 m
W x 0.2 = upward forces x 0.4 m
1.5 x 0.2 ÷0.4 = upward forces
upward forces = 0.75 Nm
b .
(I) If the weight on the shelf increases , tension will increase.
(ii ) By determining the actual weight of the shelf and its stability to hold tension.