1998 Mech
1.
A force F is exerted by a broom handle on the head of the broom, which has a mass m. The handle is at
an angle
θ
to the horizontal, as shown above. The work done by the force on the head of the broom as
it moves a distance d across a horizontal floor is
a. Fd sin
θ
b. Fd cos
θ
c. Fm cos
θ
d. Fm tan
θ
e. Fmd sin
θ
2.
The velocity of a projectile at launch has a horizontal component v
h
and a vertical component v
v
. Air resistance
is negligible.
When the projectile is at the highest point of its trajectory, which of the following show the
vertical and horizontal components of its velocity and the vertical component of its acceleration?
Vertical
Horizontal
Vertical
Velocity
Velocity
Acceleration
a.
v
v
v
h
0
b.
v
v
0
0
c.
0
v
h
0
d.
0
0
g
e.
0
v
h
g
3.
The graph above shows the velocity
v
as a function of time
t
for an object moving in a straight line.
Which of
the following graphs shows the corresponding displacement
x
as a function of time
t
for the same time interval?
4.
The position of a toy locomotive moving on a straight track along the xaxis is given by the equation
x = t
3
 6t
2
+ 9t, where x is in meters and t is in seconds.
The net force on the locomotive is equal to zero when
t is equal to
a. zero
b. 2 s
c. 3 s
d. 4 s
e. 5 s
5.
A system of two wheels fixed to each other is free to rotate about a frictionless axis through the common center
of the wheels and perpendicular to the page. Four forces are exerted tangentially to the rims of the wheels, as
shown above. The magnitude of the net torque on the system about the axis is
a. zero
b. FR
c. 2FR
d. 5FR
e. 14FR
6.
A wheel of mass M and radius R rolls on a level surface without slipping. If the angular velocity of the wheel is
ϖ
, what is its linear momentum ?
a. M
ϖ
R
b. M
ϖ
2
R
c. M
ϖ
R
2
d. M
ϖ
2
R
2
/2
e. Zero
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentQuestions 7

8
refer to a ball that is tossed straight up from the surface of a small, spherical asteroid with no
atmosphere. The ball rises to a height equal to the asteroid's radius and then falls straight down toward the
surface of the asteroid.
7.
What forces, if any, act on the ball while it is on the way up?
a. Only a decreasing gravitational force that acts downward
b. Only an increasing gravitational force that acts downward
c. Only a constant gravitational force that acts downward
d. Both a constant gravitational force that acts downward and a decreasing force that acts upward
e. No forces act on the ball.
8.
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '10
 Ramesh
 Physics, Force, Mass, Work, AP Physics, 1 m/s, 13 m/s, 0 0 G, 3.3 J

Click to edit the document details