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Inessa05 [86]
3 years ago
15

22. A race car accelerates from 0.0 m/s to 5 m/s with a displacement of 2.5 m. What is the

Physics
1 answer:
yanalaym [24]3 years ago
6 0

Answer:

Option A

5 m/s^{2}

Explanation:

From fundamental equation of motion

v^{2}=u^{2}+2as where v is the final velocity, u is the initial velocity, a is the acceleration of the body and s is the displacement.

Since the initial velocity is zero

v^{2}=2as

Making acceleration, a the subject of the formula then

a=\frac {v^{2}}{2s}

Substituting 5 m/s for v and 2.5 m for s then

a=\frac {5^{2}}{2\times 2.5}=5 m/s^{2}

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Recessed incandescent luminaires not marked type ic and those marked for installing directly in ___________ must not have insula
slavikrds [6]

Answer:

Recessed incandescent luminaires not marked type ic and those marked for installing directly in insulated ceilings must not have insulation over the top of the luminaire.

Explanation:

Depending on how they interact with insulation, lighting fixtures are rated at various levels. Non-IC rated lighting fixtures can accommodate higher wattage bulbs, but they also pose the greatest fire risk when used with the incorrect insulation.

In locations with insulation, light fixtures that are not IC rated may be installed. But there is a condition. The distance between the fixture and any insulation should be 3 inches. But the 3 inch gap in the insulation would negate the goal of insulation by producing a lot of uninsulated space, so this defies logic. Building a box-style cover to cover the fixture on the attic side is one option to fix this. Drywall or foil-faced foam insulation can be used to create this box. After the cover is put in place, insulation can be added for maximum effectiveness.

To learn more about recessed incandescent luminaries. Click brainly.com/question/17218799

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6 0
1 year ago
3.7. A dog searching for a bone walks 3.50 m south, then 8.20 m at an angle 23.1 degrees north of east, and finally 15.0 m west.
andriy [413]

Answer:

Explanation:

We shall represent displacement of dog in vector form , in terms of i , j , i representing east  and  j representing north .

Dog travels 3.5 m south .

Displacement D₁ = - 3.5 j

then dog travels 8.2 m , 23.1 degree north of east

Displacement D₂ = 8.2 cos23.1 i + 8.2 sin23 j

D₂ = 8.2 cos23.1 i + 8.2 sin23.1  j

= 7.54 i + 3.22 j  

Third displacement

D₃ = - 15i

Total displacement = D₁ + D₂ + D₃

= - 3.5 j + 7.54 i + 3.22 j  -15i

= - 7.46 i - 0.28 j

Magnitude of displacement = √ ( 7.46² + .28²)

= √(55.65 + .08 )

= 7.46 m

b ) Direction of displacement

If Ф be angle , displacement makes with west direction

TanФ =  .08 / 55.65 = .00143

Ф = .082 degree south of west or almost west .

From east , this angle = 180 + .082 = 180.082 , counterclockwise .

5 0
2 years ago
How will the boat be affected if it enters a part of the river where the current is moving south at 2 m/s?​
Paladinen [302]

Answer:

the boat will either break or go alot faster

Explanation:

3 0
3 years ago
Read 2 more answers
A soccer ball with a mass of 0.60 kg travels toward a soccer goalie at
Deffense [45]

Assuming constant acceleration, the goalie slows the ball from 18 m/s to rest in 0.035 s, so that the acceleration felt by the ball is

a_{\rm ave} = a = \dfrac{18\frac{\rm m}{\rm s}-0}{0.035\,\mathrm s} \approx \boxed{510\dfrac{\rm m}{\mathrm s^2}}

7 0
2 years ago
A mass on a spring that has been compressed 0.1 m has a restoring force of 20 N. What is the spring constant?
Schach [20]
<h2>When a mass on a spring that has been compressed 0.1 m has a restoring force of 20 N , then the value of spring constant (k) :- </h2><h2>200 N/m</h2>

Explanation:

Spring Constant :

According to Hooke's law, The force required to compress or extends spring is directly proportional to the distance it is compressed or stretched.

Given

x = -0.1 m

F  = 20 N

F - -kx

k  = -f/x

    = -20 / -0.1 = 200 N/m

The value of spring constant is 200 N/m.

6 0
3 years ago
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