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Ludmilka [50]
2 years ago
14

please go to my profile and answer the work and energy questions, i only have 20 minutes left to finish it

Physics
1 answer:
Alexeev081 [22]2 years ago
7 0

Answer:

Okay I'll do it right now

Explanation:

:)

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Fill in the blank
aliina [53]

Answer:

hypothesis

Explanation:

8 0
3 years ago
A plane starting from rest (vo = 0 m/s) when t0 = 0s. The plane accelerates down the runway, and at 29 seconds, its velocity is
IrinaK [193]

Answer:

Acceleration, a=2.48\ m/s^2

Explanation:

Given that,

The plane is at rest initially, u = 0

Final speed of the plane, v = 72.2 m/s

Time, t = 29 s

We need to find the average acceleration for the plane. It can be calculated as :

a=\dfrac{v-u}{t}

a=\dfrac{72.2}{29}

a=2.48\ m/s^2

So, the average acceleration for the plane is 2.48\ m/s^2. Hence, this is the required solution.

4 0
3 years ago
The sum of all forces acting on an object<br><br>Balance force<br><br>friction<br><br>net force
tatyana61 [14]
Net force if those the answer question
8 0
3 years ago
Read 2 more answers
You're investigating a subway accident in which a train derailed while rounding an unbanked curve of radius 150 m, and you're as
Ad libitum [116K]
Refer to the diagram shown below.

v =  35 km/h, the speed limit of the train
r = 150 m, the radius of the curve
ω =  angular velocity
m = the mass of the strap
θ° = 15, the angle the strap makes with the vertical
T = tension in the strap

Note that
v = 35 km/h = 35*0.2778 m/s = 9.7223 m/s

The tangential velocity is v = rω, therefore the angular vcelocity is
ω = (9.7223 m/s)/(150 m) = 0.0648 rad/s

The centripetal force tending to make the train derail causes the strap to make an angle of 15 with the vertical.

Let θ =  the maximum allowable angle at  35 km/h.
For horizontal equilibrium,
Tsin(θ) = mrω²
For vertical equilibrium,
Tcos(θ) = mg
Therefore
tan(θ) = (rω²)/g
          = [(150 m)*(0.0648 rad/s)]/(9.8 m/s²)
          = 0.0643
θ = tan⁻¹ 0.0643 = 3.7°

Because 15 > 3.7, we conclude that the train exceeded the 35 km/h speed limit when rounding the curve.

Answer: The train exceeded the 35 km/h speed limit.

8 0
2 years ago
Which object has the most momentum if they were all traveling 50 mph? a) A bicycle
SCORPION-xisa [38]

Train has the most momentum if they were all traveling 50 mph

<u>Explanation:</u>

  • A train can have the most momentum even if it is moving slowly because it has a large mass if they were all traveling 50 mph.
  • In simple words, momentum can be described as the amount of motion of a moving body, estimated as a product of its mass and velocity.
  • <u>Momentum= mass x velocity</u>

<u></u>

<u></u>

<u />

6 0
3 years ago
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