Phys 1L03 Winter 2010 Answers to some problems, Set 4 Set 5: Set 4 1. T1 = T2 = 35 N
6. 3 m/s2 7. 40 kg 8. 4.5x103 N 9. 2.27x104 N
10. M = 653.0 kg 11. 2 m/s2 12. 281.5 N
2. T1 = 4 N, T2 = 6.93 N 13. a. 311 N b. 0.27 m/s2 c. 2 s
3. T1 = 72.5 N,
T2 = 94.6
Phys 1L03 Tutorial session Key: Answers and some hint fro set Practice Problems
We may calculate the acceleration: Consider the two free body diagrams at question 7:
1. Fn e t = Fi = m a
F - T - f1 - f 2 = m2 a T - f1 = m1 a
Phys 1L03 Tutorial Problems sets Answers to some problems, Set 1: Set1: Unit, Significant Figures 1. b 2. c 3. b 4. m/s2 5. m2 = m2 , yes 6. m/s2 7. a 8. c 9. 5.05 cm, 5.05 x 10 -2 m 10. a. 4 sig. fig , 1.0 m b. 3 sig. fig., 8.0 cm c. 5 sig. fig, 16 kg d.
Phys 1L03 Tutorial session Eight series: Questions on Center of mass, Torque and equilibrium
1. Three masses, 2.0 kg, 3.0 kg, and 6.0 kg, are located at points (3.0, 0), (6.0, 0), and (-4.0, 0), respectively, in meters from the origin. Wher
Phys 1L03 Tutorial session Sixth series: Questions on Newton's Laws
Set 6 For week of Feb 22, 2010
1. A mother of mass 50 kg and her daughter of mass 25 kg are ice-skating. They face each other, and the mother pushes on the daughter such that the daughter
Phys 1L03 Tutorial session Fifth series: Questions on Newton's Laws
Set 5 For week of Feb 08, 2010
1. A girl pushed a 25 kg lawn mower as shown. If F= 30 N and = 37o, a. What is the acceleration of the mower, and b. What is the normal force exerted on the
Third series: Conceptual questions on kinematics. Multiple choice questions are changed for discussion. For the week of Jan 25, 2010 1. Can a body have velocity and acceleration in opposite direction in an instant?
Phys 1L03 Tutorial session First series questions on unit, significant figures, . 1. The prefix micro () means a. 106 b. 106 c. 103 d. 103 Both sides of an equation must be equal in a. Numerical value b. Units c. Dimensions d. All of the above
Set 1 Winte
Tutorial Set 11:
Answers to some Tutorial problems: Set 11:
1. a. A < B < C A<B<C b. f 1/ : fB < fC < fA B<C<A 2. E, A, D, C, B 3. b 4. a. x = 0.46 m b. ttotal = 0.84 s 5. I2 / I1 = (r1 / r2)2 r2 = 300 m 6. P0 = 2 I v = 3.4 10 Pa , A0
Phys 1L03 Tutorial session Key: Answers and some hint for set 7 problems 1.
Respect to elbow:
= F r sin o = 58.5 N.m a. = 90 o = 39.9 N.m b. = 43 o c. = 0 = 0 = F r sin = 46.75 N .m
Force, Effort = Load
F = 8 / 1.2 = 6.7 N
= net )C
1. A wood block of mass `m = 1 kg' is pressed against a vertical wall by the force `F = 10 N' as shown. The coefficient of static friction is `s = 0.7' and the angle is ` = 45o'. What is the block state of motio
Review Set 1
Questions for REVIEW
1. How many significant figures should be written in the sum of 7.56 mm + 549.165 mm + 20.048 mm + 9702.0098 mm Ans: 1027.88 (6 sig.figs.)
7. An automobile that is towing a trailer is accelerating on a level roa
Sound, Human Ear
Concepts: Sound loudness and Human ear sensitivity Waves, sound waves Standing waves, sound waves in tubes Resonance Human Ear, Ear structure Functions of different parts of human ear
Sound and Hearing
What is sound?
Why study Physics?
Physics is the foundation of every science (astronomy, biology, chemistry.).
Is this a true statements?
Why study Physics Measurement Significant Figure Uncertainty Order of magni