Student name________________________________________
Student NID__________________________________________
PHY 2053C_0001
Midterm exam 1, Feb. 11, 2011, Chapters 13
1)
(
2 points
) An object is moving along the
x
axis.
The graph shows its position from the starting
point as a function of time.
Various segments of the graph are identified by the letters A, B, C,
and D.
During which interval(s) is(are) the object moving in the negative x direction?
A)
during interval B only
B)
during intervals B and C
C)
during intervals C and D
D)
during intervals B and D
E)
during intervals B, C, and D
2)
(
2 points
) A highway is to be built between two towns, one of which lies 25.0 km south and 60.0
km west of the other.
a)
What is the shortest possible length of the highway?
b)
At what angle would this highway be directed with respect to due east?
1
(
29
(
29
2
2
1
o
r
25km
60km
65km
25km
tan
22.6
60km
θ

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+
=
=
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Student name________________________________________
Student NID__________________________________________
3)
(
3 points
) You are driving your car, and the traffic light ahead turns red.
You apply the brakes
for 2.50 s, and the velocity of the car decreases to 4.00 m/s. The car’s deceleration has a
magnitude of 2.70 m/s
2
. What is the car’s displacement?
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 Acceleration, Velocity, Student name________________________________________, Student NID__________________________________________, highest point vy

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