3 (a) A stationary object is acted upon by a number of forces. State the conditions which must be true if the object () does nat accelerate, (in does nat ratate. (b) Fig. 3.1 shows a boat that has been lifted out of a river. The boat is suspended by two ropes. It is stationary. 1.20 m þ40 m 24 Fig. 3.1 (not to scale) The weight of the boat, acting at the cectoe of mass, is 24 &N, The tensions in the ropes are Tand T. Determine (i) the moment of the weight of the boat about the point P, moment =. (ii) the tension T

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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3
(a) A stationary object is acted upon by a number of forces.
State the conditions which must be true if the object
(i) does not accelerate,
(in does not ratate.
(b) Fig. 3.1 shows a boat that has been lifted out of a river. The boat is suspended by two ropes.
It is stationary.
1P
1.20 m
p.40 m
24 k
Fig. 3.1 (not to scale)
The weight of the boat, acting at the cente of mass, is 24 &N, The tensions in the ropes are
Tand T-
Determine
(i) the moment of the weight of the boat about the point P.
moment
(ii) the tension T,.
(ii) the tension T
Transcribed Image Text:3 (a) A stationary object is acted upon by a number of forces. State the conditions which must be true if the object (i) does not accelerate, (in does not ratate. (b) Fig. 3.1 shows a boat that has been lifted out of a river. The boat is suspended by two ropes. It is stationary. 1P 1.20 m p.40 m 24 k Fig. 3.1 (not to scale) The weight of the boat, acting at the cente of mass, is 24 &N, The tensions in the ropes are Tand T- Determine (i) the moment of the weight of the boat about the point P. moment (ii) the tension T,. (ii) the tension T
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