PY205N Name (print)__________________________________
Spring
TEST 2 practice ID# ________________________________
Time limit: 75 minutes for entire test
Closed book Section#_____________________________
HONOR CODE
I have neither given nor received unauthorized aid on this test. Signed:_____________________
General information and instructions: On the blank Scantron sheet, (1) print and bubble in your
name where indicated in the upper right corner; then (2) do the same with your ID number
where indicated near the top left; then (3) bubble in your test version A or B on line 70.
The test consists of two parts: A, 15 multiple-choice problems worth 5 points each; and B,
show-your-work problems worth 25 points total.
Data: g = 9.80 m/s2; G = 6.67 1011 (N m2)/kg
Part A, multiple-choice: Bubble in your answers on the Scantron sheet lines 1-15. You may
write on part A, but your work in part A will not be graded.
1. A stone that weights 980 N on Earth is transported to the surface of Mars, where the
gravitational constant gMars = 3.71 m/s2. On the surface of Mars the stone
(a) weighs 980 N and its mass is 100 kg
(b) weighs 980 N and its mass is 37.1 kg
(c) weighs 100 N and its mass is 37.1 kg
(d) weighs 371 N and its mass is 100 kg
(e) weighs 371 N and its mass is 37.1 kg
2. Let
A=6^
i−3^
j+2^
k
and
B=−^
i+2^
j+2^
k
. The product
A⋅
B
is equal to
(a)
−6^
i
(b) 16
(c) zero
(d) – 8
(e) none of the above
3. A 1800 kg car travels 200 m at 30 m/s while rounding an unbanked curve of radius 200 m.
Assuming that the car does not slide, the work done by static friction during this motion is
(a) 7.9 104 J
(b) 1.2 104 J
(c) 400 J
(d) 270 J
(e) zero
