PHYS 251 / BMS 511
Homework Assignment #12
Due: Monday, December 9
1. Univ. Phys. 13th Discussion Questions. (a) Q13.1 A student wrote; (b) Q13.10. As
defined in Chapter 7 (c) Q13.20. In the elliptical orbit of Comet Halley
a) The student is incorrect. Bo

PHYS 251 / BMS 511
Homework Assignment #11
Due: Monday, November 25
1. Univ. Phys. 13th Exercise 15.16. With what tension must a rope
(
)
(
)(
) (
)
2. Univ. Phys. 13th Exercise 15.22. A piano wire with mass
a)
(
) (
) (
)(
b) It decreases by a factor of

PHYS 251 / BMS 511
Homework Assignment #9
Due: Wednesday, November 6
1. You have your bicycle balanced upside down for repairs. The front wheel is free to rotate
and is perfectly balanced except for the 25-g valve stem. If the valve stem is 32 cm from the

PHYS 251 / BMS 511
Homework Assignment #10
Due: Monday, November 18
1. Univ. Phys. 13th Discussion Questions. (a) Q14.1 An object is moving (b) Q14.9 The
system shown in Fig. 14.17 (vertical mass-spring) (c) Q14.12 What should you do
a) If amplitude is do

PHYS 251 / BMS 511
Homework Assignment #8
Due: Wednesday, October 30
1. Determine the angular speed, in rad/s, of (a) Earth about its axis; (b) the minute hand of a
clock; (c) the hour hand of a clock; (d) an egg beater turning at 300 rpm.
a) Earth:
(
)
(

PHYS 251 / BMS 511
Homework Assignment #7
Due: Wednesday, October 23
1. Univ. Phys. 13th Discussion Questions. (i) Q8.24, (ii) Q8.25, (iii) Q8.26
i) a inelastic collisions do not conserve mechanical energy (kinetic + potential)
ii) c without friction, tot

PHYS 251 / BMS 511
Homework Assignment #5
Due: Monday, October 7
Please show all work neatly and box the final answer. Remember to include units and the
correct number of significant figures.
1. Univ. Phys. 13th Exercise 4.28. A person pulls horizontally

PHYS 251 / BMS 511
Homework Assignment #3
Due: Monday, September 16
Please show all work neatly and box the final answer. Remember to include units and the
correct number of significant figures.
1. (a) Is it possible to be at position x = 0 and still be m

PHYS 251 / BMS 511
Homework Assignment #2
Solutions
1. (a) Can two vectors of equal magnitude sum to zero? Can two vectors of unequal magnitude
sum to zero? (b) Repeat part (a) for three vectors.
(a) (i) Yes (e.g.
). (ii) No.
(b) (i) Yes (Any 3 vectors t

PHYS 251 / BMS 511
Homework Assignment #4
Due: Monday, September 23
Please show all work neatly and box the final answer. Remember to include units and the
correct number of significant figures.
1. Univ. Phys. 13th Exercise 3.24. Our balance is maintained

PHYS 251 / BMS 511
Homework Assignment #1
Solutions
1. Univ. Phys. 13th Exercise 1.1. Starting with the definition
(a)
(b)
2. Univ. Phys. 13th Exercise 1.7. How many years older
giga109, so 1 gigasecond = 109 s
3. In the 1908 London Olympic Games, the ori