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ITP
Mechanical Equilibrium and Forces (Ch. 2)
Free-Body Diagrams Practice
Name ___________________
Date _______ P ___ T____
Using graph paper and a straight edge, draw free-body diagrams for the
situations that follow.
 Give a title to the diagram (Example: 1. Book weighing 8N at rest on
table top)
 Consider the motion of the object and the forces involved.
 Label the vectors with the correct type of force using subscripts.
 Make sure that the vectors are to scale and mind the vector length.
1. A book weighing 8 N is at rest on a table top. Diagram the forces acting on the
book.
2. A girl weighing 450 N is suspended motionless from the gymnasium ceiling by
gripping two rope rings. Diagram the forces acting on the combination of girl and
bar.
3. An egg is free-falling from a nest in a tree. Diagram the forces acting on the egg
as it is falling.
4. A rightward force of 20 N is applied to a book in order to move it across a desk
with a rightward acceleration. Diagram the forces acting on the book.
Net force = 15 N.
5. A rightward force of 15 N is applied to a book in order to move it across a desk at
constant velocity. Diagram the forces acting on the book.
6. A skydiver weighing 600 N is descending with acceleration. Diagram the forces
acting upon the skydiver. Net force = 400 N.
7. A skydiver weighing 600 N is descending with a constant velocity. Diagram the
forces acting upon the skydiver.
8. A force is applied to the right to drag a sled across loosely-packed snow with a
rightward acceleration. Diagram the forces acting upon the sled. Net force = 200
N.
9. A 2,500 N force causes a car weighing 5000 N to travel to the right at a constant
velocity. Diagram the forces acting upon the car.
10. A car weighing 5000 N is coasting to the right as it slows down. The net force at
this instant is 1550 N. Diagram the forces acting upon the car.