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WorksheetsConcurrent forces
Total questions: 11
Worksheet time: 13mins
A number of forces are concurrent when the lines of action of all of the forces
occur at the same time
pass through the same point
are parallel to each other
are not parallel to each other
When two forces act together on a force meter as shown, the reading on the meter will be
0 N
5 N
10 N
20 N
What will the readings be on these force meters?
Left, 10 N; right pair 5 N each
All 0 N
Left, 20 N; right pair 10 N each
All 10 N
Two (or more) forces can be added together to find the resultant force. The forces can be drawn "head to tail" - in any order. The resultant can then be drawn from the ________ of the first to the _______ of the last.
( just write the missing words )
(a)
The cables A and B are both in tension. The tension in B is much greater than in A. In what direction will the resultant force on the support fixing be acting?
down and to the right
up and to the right
down and to the left
up and to the left
The cables A and B are both in tension. The tension in B is much greater than in A. In what direction will the equilibrant (reaction) force provided by the support fixing be acting?
down and to the right
up and to the right
down and to the left
up and to the left
The tensile force in cable A is 10 N, in B the tensile force is 25 N. The force triangle showing the forces (FA) and (FB) and the sum of the forces (R) will be
Use the cosine rule ( a2 = b2 + c2 - 2b.c.cos A ) to calculate the magnitude of the resultant force R
R = 35.0 N
R = 32.8 N
R = 1079 N
R = 19.3 N
Use the sine rule ( a / sin A = b / sin B = c / sin C ) and the magnitude of R = 32.8 N to calculate the direction of the resultant force relative to FA.
The resultant force R acts upwards and 15° CW from A
The resultant force R acts upwards and 33° ACW from A
The resultant force R acts upwards and 15° ACW from A
The resultant force R acts downwards and 33° CW from A
The tensile force in cable A is 10 N, in B the tensile force is 25 N. The force triangle showing the forces (FA) and (FB) and the equilibrant (E) can be drawn as (choose all that apply):
The resultant force R has a magnitude of 32.8 N and acts upwards and 33° ACW from A. State the magnitude of the equilibrant and its direction relative to FA.
The equilibrant has a magnitude of 35 N and acts downwards and 75° CW from A
The equilibrant has a magnitude of 32.8 N and acts downwards and 147° ACW from A
The equilibrant has a magnitude of 32.8 N and acts upwards and 147° CW from A
The equilibrant has a magnitude of 32.8 N and acts downwards and 147° CW from A
