Conceptual Physics

Answers to selected problems

Chapter 2 Answers

C.1 No

C.5 (a) í15 m

(b) 15 m

C.7 Yes

Answers vary

C.9 Instantaneous velocity

C.12Zero

C.13No

Answers vary

0.1 Negative

1.1 1.6 meters

2.1 1 step(s)

2.3 (a) 5.3 km

(b) 5300 m

3.1 0.343 km

3.3 2.4e+3 s

4.1 (a) 0.063 m/s

(b) 240 m/s

4.3 (a) 138 km

(b) 110 km/h

4.5 (a) 10 ft/s

(b) 11 km/h

4.7 21.0 s

5.1 (a) 1440 m

(b) 7200 s

5.3 (a) 3.0 m/s

(b) í3.0 m/s

(c) 0 m/s

5.5 5.40 m/s

7.1(a) Right

(b) Zero

(c) Start the ball moving slowly to the left and then

increase its speed.

8.16.67 s

9.11.90e+5 m/s^2

9.3(a) 0 m/s^2

(b) 9.6 m/s^2

(c) 7.7 m/s^2

9.5(a) 0 cm/s^2

(b) í3.0 cm/s^2

(c) 3.0 cm/s^2

9.7 31 v/5

10.1(a) 1.0 s to 2.0 s

(b) 0 to 1.0 s

(c) 4.0 to 5.0 s

13.1The white rabbit

The black rabbit

15.12.8 m/s

15.3(a) 15.0 m

(b) 3.04 s

15.5a = 2(vt + d)/t^2

18.1 3.19 m/s

18.3 76.7 m/s

18.5 0.682 m/s^2

18.7 1.24 s

18.9 í4.2 m/s

18.11(a) 1.22 s

(b) 9.10 m

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