68 MECHANICAL ENGINEERING PRINCIPLES
10 N
1 m
3 m
5 m
B
RA RB
A
20 N
Figure 5.34
- The force acting at B (i.e. RB)in
Figure 5.34 is:
(a) 16 N (b) 20 N
(c) 5 N (d) 14 N
- The force acting at A (i.e. RA)in
Figure 5.34 is:
(a) 16 N (b) 10 N
(c) 15 N (d) 14 N
- Which of the following statements is
false for the beam shown in Figure 5.35
if the beam is in equilibrium?
6 N
3.0 m 1.0 m3.0 m
R
3 N F
Figure 5.35
(a) The anticlockwise moment is 27 N
(b) The forceF is 9 N
(c) The reaction at the support R is
18 N
(d) The beam cannot be in equilibrium
for the given conditions
- With reference to Figure 5.36, the reac-
tionRAis:
(a) 10 N (b) 30 N
(c) 20 N (d) 40 N
10 N 10 N
0.5 m 0.5 m 0.5 m 0.5 m
RA RB
20 N
Figure 5.36
- With reference to Figure 5.36, when
moments are taken aboutRA,thesum
of the anticlockwise moments is:
(a) 25 N m (b) 20 N m
(c) 35 N m (d) 30 N m - With reference to Figure 5.36, when
moments are taken about the right-
hand end, the sum of the clockwise
moments is:
(a) 10 N m (b) 20 N m
(c) 30 N m (d) 40 N m - With reference to Figure 5.36, which of
the following statements is false?
(a) ( 5 +RB)=25 N m
(b) RA=RB
(c) ( 10 × 0. 5 )=( 10 × 1 )+( 10 × 1. 5 )
+RA
(d) RA+RB=40 N
- A beam simply supported at its ends
is subjected to two intermediate couples
of 4 kN m clockwise and 4 kN m anti-
clockwise. The values of the end reac-
tions are:
(a) 4 kN (b) 8 kN
(c) zero (d) unknown