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alekssr [168]
3 years ago
10

Could someone tell me if this is right or give me the answers so i can re write them! That would be so helpful:)

Physics
2 answers:
sweet-ann [11.9K]3 years ago
7 0

Answer:

They are right! Nice job!

Explanation:

Ivahew [28]3 years ago
6 0

Answer:

Those are all right

Explanation:

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Which force is represented by the arrow at
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The directions of B and C both depend on the slope of the plane.

B is a force that's parallel to the plane, pulling the block UP the plane. B is the force of friction.

C is a force perpendicular to the plane, preventing the block from falling down through the plane. C is the normal force.

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A rocket is being launched straight up. Air resistance is not negligible.
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A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s2. how far does the car travel while accelerating?
Snezhnost [94]
Answer is in attachment.

3 0
3 years ago
A car has a mass of 900 kilograms and has a force of 4500 to the left what is the acceleration
pychu [463]

Answer: A- A truck has a mass of 900 kilograms.

If the velocity of the truck is 20 m/s, what is its momentum?

1- 180000 kg·m/s

2-0 kg·m/s

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3 0
2 years ago
A small mirror is attached to a vertical wall, and it hangs a distance of 1.87 m above the floor. The mirror is facing due east,
Oksana_A [137]

Answer:

 t = 1.62 h

Explanation:

A flat mirror fulfills the law of reflection where the incident angle is equal to the reflected angle.

          θ_i = θ_r

If we use trigonometry to find the angles, the mirror is at a height of L = 1.87 m,   and the reflected rays reach a distance x1 = 3.56 m

         tan θ₁ = x₁ / L

         tan θ₁ = \frac{3.56}{1.87}

         θ₁ = tan⁻¹  1.90

         θ₁ = 62.29º

for the second case x₂ = 1.46 m

        tan θ₂ = x₂ / L

        θ₂ = tan⁻¹  \frac{1.46}{1.87}

        θ₂ = 37.98º

the difference in degree traveled is

         Δθ = θ₁- θ₂

          Δθ = 62.29 - 37.98

          Δθ = 24.31º

as in the exercise they indicate that every 15º there is an hour

         t = 24.31º (1h / 15º)

         t = 1.62 h

4 0
3 years ago
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