adee (sna2278) – Homework 4, Newton’s laws 21-22 – dowd – (MillerKPHY1 2) 1
This print-out should have 24 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001 (part 1 of 2) 10.0 points
A book is at rest on an incline as shown
below. A hand, in contact with the top of
the book, produces a constant force Fhand
vertically downward.
Fhand
Book
The following figures show several attempts
at drawing free-body diagrams for the book.
Which figure has the correct directions for
each force? The magnitudes of the forces are
not necessarily drawn to scale.
1.
Fg
Fhand FN
Ff
2.
Fg
Fhand
Ff
FN
3.
Fg
Fhand
FN
Ff
4.
FN
FfFg
Fhand
5.
FN
Fhand
Ff
Fg
6.
Fg
Ff
Fhand
FN
7.
Fg
Ff
FN
Fhand
8.
Fg
FN
Ff
Fhand
002 (part 2 of 2) 10.0 points
For the normal force exerted on the book
by the wedge in the diagram, which force(s)
complete(s) the force pair for Newton’s third
law (action-reaction)?
adee (sna2278) – Homework 4, Newton’s laws 21-22 – dowd – (MillerKPHY1 2) 2
1. the pull of the book on the earth
2. the component of gravity pointing parallel
to the surface of the incline
3. the pull of the earth on the book
4. the normal force exerted on the wedge by
the book
5. the sum of the component of gravity per-
pendicular to the surface of the incline and
the component of Fhand perpendicular to the
surface of the incline
6. the component of gravity pointing per-
pendicular to the surface of the incline
7. the component of Fhand pointing perpen-
dicular to the surface of the incline
003 (part 1 of 2) 10.0 points
A balloon is waiting to take off. As seen in
the figure below, the balloon’s basket sits on
3.
Fplat on bask
Fplat on ground
Fgrav on plat
4.
Fground on plat
Fgrav on plat Fbask on plat
5.
Fbal on plat
Fgrav on plat
004 (part 2 of 2) 10.0 points
What is the free body diagram for the bas-
ket? Again some parallel vectors are offset
horizontally for clarity.
1.
Fbal on bask
