,

Free-Body Diagrams Worksheet !1. Free-body diagrams for foUl'situations are shown below. Fur each situation,

determine the net force acting upon the object.

Situlltion A Si tUllt ion B

FC)rav= '3 H fgrav'""'3 N

SitUlltion C Si tUllt ion 0

fl)r~y '"'25 N

2. Free-body diagrams for four situations are shown below. The net force is knownfor each situation. However, the magnitudes of a few of the individual forces arenot known. Analyze each situation individually and detem1ine the magnitude ofthe unknown forces.

fnet=ON fnot~ 900 N, up f not = 60 N, left Fnot ~ 30 N, right

-.-

3. A book is at rest on a table-top. A free-body diagram for this situation looks likethis:

4. A girl is suspended motionless from a bar which hangs from the ceiling by tworopes. A free-body diagram for this situation looks like this:

"

5. An egg is free-falling from a nest in a tree. Neglect air resistance. A free-bodydiagram for this situation looks like this:

6. A flying squirrel is gliding (no wingjlaps) from a tree to the ground at constantvelocity. Consider air resistance. A free-body diagram for this situation looks likethis:

7. A rightward force is applied to a book in order to move it across a desk with arightward acceleration. Consider frictional forces. Neglect air resistance. A free-body diagram for this situation looks like this:

8. A rightward force is applied to a book m order to move it across a desk atconstant velocity. Consider frictional forces. Neglect air resistance. A free-bodydiagram for this situation looks like this:

9. A college student rests a backpack upon his shoulder. The pack is suspendedmotionless by one strap from one shoulder. A free-body diagram for tillS situationlooks like tllis:

10. A skydiver is descending with a constant velocity. Consider air resistance. A free-body diagram for this situation looks like this:

-\

11. A force is applied to the right to drag a sled across loosely-packed snow with arightward acceleration. A free-body diagram for this situation looks like this:

y ,

12. A football is moving upwards towards its peak after having been booted by thepunter. A free-body diagram for this situation looks like this:

--- ./

13. A car is coasting to the right and slowing down. A free-body diagram for thissituation looks like this:

r ll-A car is coastingto the right and

slowing down

12-A flying squirrel isgliding (no wing flaps)to the ground atconstant velocity

13-A football ismoving up towards itspeak after havingbeen kicked

14-A horizontal forceis applied to an objectin order to accelerateit

15-A force is appliedto an object in order

\to move it at aconstant velocity

\

.,

Q-Rolling along asurface with appliedforce and friction atconstant velocity

I-Rolling along asurface with appliedforce and frictionwith one greater thanthe other

~- True free fall-noforce opposes theweight

2-A gymnast issuspended motionlessfrom a bar whichhangs from the ceilingb two ro es

10-A college studentrests a backpack upon

one shoulder

l,1-

. ,

h,NamePeriod .._

{TAPE DIAGRAMS HERE AND FILL IN THE OTHER TWO COLUMNS!

Free Body Diagrams-Cut and Tape

l-Falling on the moon-no air drag

,g-At rest on thetable-no horizontal

forces

J.~Falling on Earth atterminal velocity

1-Falling on Earth, butterminal velocity not

yet reached

~-A book is at rest ona tabletop