Recitation class

Сентябрь 14, 2022

Содержание

2. Chapter 2
3. [Problem 29] A car moving at a constant velocity of 46 m/s passes a traffic cop
4. [Problem 29] A car moving at a constant velocity of 46 m/s passes a traffic cop
5. [Problem 58] An object falls a distance h from rest. If it travels 0.60h in the
6. [Problem 58] An object falls a distance h from rest. If it travels 0.60h in the
7. [Problem 58] An object falls a distance h from rest. If it travels 0.60h in the
8. [Problem 58] An object falls a distance h from rest. If it travels 0.60h in the
9. [Problem 58] An object falls a distance h from rest. If it travels 0.60h in the
10. 1.00 s
11. 1.00 s
12. 1.00 s
13. 1.00 s
14. 1.00 s
15. 1.00 s
16. 1.00 s
17. We take Why? 1.00 s
18. We take Why? Negative time indicates a time before the object was dropped Answer of (c)
19. Plugging Eq. (3) into (1), 1.00 s
20. 1.00 s
21. Chapter 4
24. Chapter 5
26. (a) (b) before the block is lifted off the floor (c) acceleration is still in the
27. [Problem 67] The figure shows three blocks attached by cords that loop over frictionless pulleys. Block
28. [Problem 67] The figure shows three blocks attached by cords that loop over frictionless pulleys. Block
29. [Problem 67] The figure shows three blocks attached by cords that loop over frictionless pulleys. Block
30. [Problem 67] The figure shows three blocks attached by cords that loop over frictionless pulleys. Block
31. Chapter 6
32. [Problem 10] In the figure, a block of weight W experiences two applied forces, each of
33. W/2 W/2 W/4 W [Problem 10] In the figure, a block of weight W experiences two
34. W/2 W/2 W/4 W [Problem 10] In the figure, a block of weight W experiences two
37. Block does not stick together !! 80 N 59 N
38. (a) accelerations of the block (b) accelerations of the slab
40. boom car is at rest at the top car and riders car+riders
47. car and riders
48. car and riders (a), (b) the direction of the force from the boom is upward
50. Скачать презентацию

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Chapter 2

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[Problem 29] A car moving at a constant velocity of 46

m/s passes a traffic cop who is readily sitting on his motorcycle. After a reaction time of 1.0s, the cop begins to chase the speeding car with a constant acceleration of 4.0 m/s^2. How much time does the cop need to overtake the speeding car?

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[Problem 29] A car moving at a constant velocity of 46

m/s passes a traffic cop who is readily sitting on his motorcycle. After a reaction time of 1.0s, the cop begins to chase the speeding car with a constant acceleration of 4.0 m/s^2. How much time does the cop need to overtake the speeding car?

Car

Car

Car

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[Problem 58] An object falls a distance h from rest. If

it travels 0.60h in the last 1.00 s, find (a) the time and (b) the height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain.?

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[Problem 58] An object falls a distance h from rest. If

it travels 0.60h in the last 1.00 s, find (a) the time and (b) the height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain.?

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[Problem 58] An object falls a distance h from rest. If

it travels 0.60h in the last 1.00 s, find (a) the time and (b) the height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain.?

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[Problem 58] An object falls a distance h from rest. If

it travels 0.60h in the last 1.00 s, find (a) the time and (b) the height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain.?

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[Problem 58] An object falls a distance h from rest. If

it travels 0.60h in the last 1.00 s, find (a) the time and (b) the height of its fall. (c) Explain the physically unacceptable solution of the quadratic equation in t that you obtain.?

1.00 s

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1.00 s

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1.00 s

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1.00 s

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1.00 s

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1.00 s

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1.00 s

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1.00 s

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We take

Why?

1.00 s

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We take

Why?
Negative time indicates a time before the object was

dropped

Answer of (c)

1.00 s

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Plugging Eq. (3) into (1),

1.00 s

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1.00 s

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Chapter 4

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Chapter 5

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(a)

(b)

before the block is lifted off the floor

(c) acceleration is still

in the x axis

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[Problem 67] The figure shows three blocks attached by cords that

loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 6.00 kg, mB = 8.00 kg, and mC = 10.0 kg. When the blocks are released, what is the tension in the cord at the right?

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[Problem 67] The figure shows three blocks attached by cords that

loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 6.00 kg, mB = 8.00 kg, and mC = 10.0 kg. When the blocks are released, what is the tension in the cord at the right?

mCg

mAg

TC

Assume a clockwise motion
(Downward is positive for block C,
Rightward is positive for block B,
Upward is positive for block A.)

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[Problem 67] The figure shows three blocks attached by cords that

loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 6.00 kg, mB = 8.00 kg, and mC = 10.0 kg. When the blocks are released, what is the tension in the cord at the right?

mCg

mAg

TC

Assume a clockwise motion
(Downward is positive for block C,
Rightward is positive for block B,
Upward is positive for block A.)

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[Problem 67] The figure shows three blocks attached by cords that

loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 6.00 kg, mB = 8.00 kg, and mC = 10.0 kg. When the blocks are released, what is the tension in the cord at the right?

mCg

mAg

TC

Assume a clockwise motion
(Downward is positive for block C,
Rightward is positive for block B,
Upward is positive for block A.)

The force for just on block C:

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Chapter 6

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[Problem 10] In the figure, a block of weight W experiences

two applied forces, each of magnitude W/2. What coefficient for static friction between the block and the floor puts the block on the verge of sliding?

W/2

W/2

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W/2
W/2

W/4
W

[Problem 10] In the figure, a block of weight W experiences

two applied forces, each of magnitude W/2. What coefficient for static friction between the block and the floor puts the block on the verge of sliding?

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W/2
W/2

W/4
W

[Problem 10] In the figure, a block of weight W experiences

two applied forces, each of magnitude W/2. What coefficient for static friction between the block and the floor puts the block on the verge of sliding?

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Block does not stick together !!

80 N
59 N

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(a) accelerations of the block

(b) accelerations of the slab

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boom
car is at rest at the top

car and riders
car+riders

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car and riders

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car and riders

(a), (b)

the direction of the force from the

boom is upward