Physics --- Composition of Forces WS
Name ___________________________
Conceptual Questions:
1. Concurrent forces are two or more forces that act on the same ____________________
at the same ____________________________.
2. Concurrent forces can be treated as vector ( components , resultants ). Finding the
resultant of these forces is called ___________________________________ of forces.
Why is this a better term than addition of forces?
3. When a parallelogram is constructed in order to combine forces, the resultant is the
___________________________________ of the parallelogram.
4. What is the resultant of a pair of forces, 100.0 N North and 70.0 N South?
What is the resultant of the pair of forces if they both act North?
5. The state of a body in which there is no change in its motion is called
_____________________.
6. When no unbalanced forces act on an object, the object can have no
_____________________ ______ ______________________.
7. What is the net force that acts on an object in equilibrium? ____________________.
8. A(n) ______________________________ force is the force required to put an object in
a state of equilibrium. This force has the same ______________________________ but
opposite ___________________________ to the resultant of the concurrent forces
acting on the object.
9. Understanding the Law of Acceleration (Newton’s 2nd Law), the equilibrant force causes the net
force = _____, the acceleration will be ________, and the velocity is ______________________.
SP1d. Measure and calculate the magnitude of frictional forces and Newton’s three Laws of Motion.
SP1h. Determine the conditions required to maintain a body in a state of static equilibrium.
Physics --- Composition of Forces WS
Name ___________________________
Mathematical Problems:
10. What is the resultant of these concurrent forces?
5 N North, 12 N South, 7 N South, 6 N North
What is the magnitude and direction of the equilibrant force for this situation?
11. A)
On force acts westward on an object with a magnitude of 24.0 N, the other force acts
southward with a magnitude of 18.0 N. Compose these two concurrent forces into their
resultant. (Remember to give magnitude and direction!)
B)
As long as these forces act on the object it will ( move uniformly , accelerate ) in what
direction? ____________________________________
C)
What would be the magnitude and direction of an equilibrant force for this situation?
___________________________________________________________________
D)
As soon as this force is applied, the object will ( stop , slow down, move uniformly ).
12. Find the magnitude and direction of the equilibrant force for these two concurrent forces:
13.5 N West and 32.0 N North
SP1d. Measure and calculate the magnitude of frictional forces and Newton’s three Laws of Motion.
SP1h. Determine the conditions required to maintain a body in a state of static equilibrium.