QUICK QUESTION 1
PHYS1114 COLLEGE PHYSICS I
MOTION ALONG A PATH
Fall 2012 Professor Kenny L. Tapp
A park ranger wanted to measure the height of a tall tree. The
ranger stood 6.10 m from the base of the tree; and he observed
that his line of sight made an angle of 73.5° above the
horizontal as he looked at the top of the tree. What is the
height of the tree?
a) 5.84 m
b) 8.77 m
c) 11.7 m
d) 17.3 m
e) 20.6 m
QUICK QUESTION 2
A particle travels along a curved path between two points A and
B as shown. Complete the following statement: The
displacement of the particle does not depend on
QUICK QUESTION 3
Complete the following statement: A displacement vector
a) is directed from an object’s final position toward its initial
position.
a) the location of A.
b) is always directed along a tangent to the object’s path.
b) the location of B.
c) the direction of A from B.
c) has a magnitude that always equals the distance the object
traveled from its initial position to its final position.
d) the distance traveled from A to B.
d) has SI units of meter per second.
e) the shortest distance between A and B.
e) is directed from an object’s initial position toward its final
position.
QUICK QUESTION 4
A delivery truck leaves a warehouse and travels 3.20 km east.
The truck makes a right turn and travels 2.45 km south to
arrive at its destination. What is the magnitude and direction of
the truck’s displacement from the warehouse?
QUICK QUESTION 5
Which one of the following quantities is an object’s
displacement divided by the elapsed time of the displacement?
a) average velocity
a) 4.03 km, 37.4° south of east
b) instantaneous velocity
b) 2.30 km, 52.5° south of east
c) average displacement
c) 0.75 km, 37.8° south of east
d) average acceleration
d) 2.40 km, 45.0° south of east
e) instantaneous acceleration
e) 5.65 km, 52.5° south of east
QUICK QUESTION 6
A train leaves a station, starting from rest, at time t = 0.0 s. At
time t = 3600.0 s, the train is traveling due west at 28 m/s. In
this example, the 28 m/s is the train’s
a) average speed
b) average velocity
QUICK QUESTION 7
Complete the following statement: The difference between
speed and velocity is...
a) speed is an average value, but velocity is always an
instantaneous measurement.
b) velocity is an average, but speed is always an instantaneous
measurement.
c) average acceleration
c) speed has a direction, but velocity does not.
d) instantaneous velocity
d) velocity has a direction, but speed does not.
e) instantaneous acceleration
e) There is no difference between speed and velocity.
QUICK QUESTION 8
Which one of the following is not a vector quantity?
QUICK QUESTION 9
Which one of the following quantities is defined as the distance
traveled divided by the elapsed time for the travel?
a) acceleration
a) average speed
b) displacement
b) average velocity
c) instantaneous velocity
c) average acceleration
d) average velocity
d) instantaneous velocity
e) average speed
e) instantaneous acceleration
QUICK QUESTION 10
On which one of the following does the average speed depend?
a) the direction of motion
QUICK QUESTION 11
Which one of the following quantities is the change in object’s
velocity divided by the elapsed time as the elapsed time
becomes very small?
b) the total distance traveled
a) average velocity
c) the displacement
b) instantaneous velocity
d) the instantaneous speed at the starting point
c) average displacement
e) the instantaneous velocity
d) average acceleration
e) instantaneous acceleration
QUICK QUESTION 12
QUICK QUESTION 13
Which one of the following situations does the object have no
acceleration?
A sports car starts from rest. After 10.0 s, the speed of the car
is 25.0 m/s. What is the magnitude of the car’s acceleration?
a) A ball at the end of a string is whirled in a horizontal circle at a
constant speed.
a) 2.50 m/s2
b) Seeing a red traffic light ahead, the driver of a minivan steps
on the brake. As a result, the minivan slows from 15 m/s to
stop before reaching the light.
b) 5.00 m/s2
c) 10.0 m/s2
c) A boulder starts from rest and rolls down a mountain.
d) An elevator in a tall skyscraper moves upward at a constant
speed of 3 m/s.
e) A ball is thrown upward from the surface of the earth, slows to
a temporary stop at a height of 4 m, and begins to fall back
toward the ground.
d) 25.0 m/s2
e) 250 m/s2