Physics 201 Summer 2014 Test 2 1) A girl attaches a rock to a string, which she
ID: 1311499 • Letter: P
Question
Physics 201 Summer 2014 Test 2
1) A girl attaches a rock to a string, which she then swings counter-clockwise in a horizontal circle. The string breaks at point P in the figure, which shows a bird's-eye view (as seen from above). Which path (A-E) will the rock follow?
A) Path A B) Path B C) Path C D) Path D E) Path E
2) A certain aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is a constant 445,000 N, what is the speed of the airplane 10.0 s later?
A) 10.0 m/s B) 12.2 m/s C) 14.0 m/s D) 18.0 m/s E) 20.0 m/s
3) The figure shows an acceleration-versus-force graph for a 125-g object. What should be the value of the first tick-mark on the vertical scale, as indicated by the arrow in the figure?
A) 4
B) 8
C) 0.00400
D) 0.00800
E) 0.00004
4) Two forces act on a 55kg object. One force has magnitude 65 N directed 59
Explanation / Answer
1.) B
2.) B
3.) A
4.) B
5.) C
6.) A
7.) C
8.) B
9.) A
10.)C
11.) A
12.) E.. it slips
13.) B
14.) B
15.) A
16.) A
17.) A
18.) C
19.) A
20.) A
21.) D
22.) B
23.) A
24.) D
25.) A
26.) B
27.) A
28.) A
29.) C
30.) D