The passage says that the president's guests "believed the rest at the 'Little

Block A has a weight of 8 lb. and block B has a weight of 6 lb. They rest on a surface for which the coefficient of kinetic fric

kkurt [141]

Answer:

For block A, a = 9.66 ft/s²

For block B, a = 15 ft/s²

Explanation:

A free body diagram for this force system is attached to this solution

Mass of block A = m₁ = 8 lb

Mass of block B = m₂ = 6 lb

Coefficient of kinetic friction = μ

Normal reaction on the blocks = N

Spring stiffness of the spring btw block A and B = k = 20 lb/ft

Compression of the spring = 0.2 ft

Analysing Block A first

The forces on block A include, the weight, normal reaction, frictional force and the elastic force due to the spring

Sum of forces in the y-direction = 0

So, the weight of the block = Normal reaction of the surface on the block

N = W = 8 lb

Sum of forces in the x-direction = maₓ

(k × x) - (μ × N) = maₓ

m = W/g = 8/32.2 = 0.248 lbm

(20×0.2) - (0.2 × 8) = (0.248) aₓ

aₓ = 9.66 ft/s²

The forces on block B include, the weight, normal reaction, frictional force and the elastic force due to the spring

Sum of forces in the y-direction = 0

So, the weight of the block = Normal reaction of the surface on the block

N = W = 6 lb

Sum of forces in the x-direction = maₓ

(k × x) - (μ × N) = maₓ

m = W/g = 6/32.2 = 0.186 lbm

(20×0.2) - (0.2 × 6) = (0.186) aₓ

aₓ = 15 ft/s²

4 0

4 years ago

Question 1

san4es73 [151]

quite some questions, good thing i like cars

1. A passenger may be distracting which may be harmful. and a passenger may be helpful by pointing tings you missed and help you in situations

2. Low eyes, sick face, non understandable speaking, crooked walking and smell

3. by distracting you, by making you angry which may cause you to drive like a maniac, and by building on stress which will make you lose your patience which will make you want to drive faster

4. question is confusing but by what I understand. it would be checking mirrors, checking your seat position and adjusting your seat belt

5 0

4 years ago

The structure consists of a very large steel plate they will be used to transfer an in plane tensile stress. You have informatio

SpyIntel [72]

Answer:

$\mathbf{\sigma_{max} =638.308 \ MPa}$

Explanation:

For any large steel plate with an infinite length and width and a center through the crack under tension, the stress intensity factor can be expressed as:

$K_I = \sigma \sqrt{\pi a}$

where;

a = 2.5 mm/2

a = 1.25 mm

a = 1.25 × 10⁻³ m

Therefore; the maximum stress in tension capacity can be computed as;

$\sigma_{max} = \dfrac{K_{I_C}}{\sqrt{\pi a_c}}$

$\sigma_{max} = \dfrac{40}{\sqrt{\pi \times 1.25 \times 10^{-3}}}$

$\mathbf{\sigma_{max} =638.308 \ MPa}$

6 0

3 years ago

As a top-level executive at your own company, you are worried that your employees may steal confidential data too easily by down

DENIUS [597]

Answer:

Create and enforce a written company policy against the use of thumb drives, and install a technical controls on the computers that will prevent the use of thumb drives.

Explanation:

6 0

4 years ago

Acertain foundation will experience a bearing capacity failurewhen it is subjected to a downward load of 2200 kN. Using ASD with

ehidna [41]

Answer:

Um...

Explanation:

This is what I like to see teachers giving out.

7 0

3 years ago