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3 years ago

When air resistance balances the weight of an object that is falling, the velocity _____.

Physics

1 answer:

miskamm [114]3 years ago

5 0

Decreases. Air resistance will slow a falling object to its terminal velocity, placing a limit on its acceleration.

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Two manned satellites approach one another at a relative velocity of v=0.190 m/s, intending to dock. The first has a mass of m1=

drek231 [11]

Answer:

Their final relative velocity is 0.190 m/s

Explanation:

The relative velocity of the satellites, v = 0.190 m/s

The mass of the first satellite, m₁ = 4.00 × 10³ kg

The mass of the second satellite, m₂ = 7.50 × 10³ kg

Given that the satellites have elastic collision, we have;

$v_2 = \dfrac{2 \cdot m_1}{m_1 + m_2} \cdot u_1 - \dfrac{m_1 - m_2}{m_1 + m_2} \cdot u_2$

$v_2 = \dfrac{ m_1 - m_2}{m_1 + m_2} \cdot u_1 + \dfrac{2 \cdot m_2}{m_1 + m_2} \cdot u_2$

Given that the initial velocities are equal in magnitude, we have;

u₁ = u₂ = v/2

u₁ = u₂ = 0.190 m/s/2 = 0.095 m/s

v₁ and v₂ = The final velocities of the satellites

We get;

$v_1 = \dfrac{2 \times 4.0 \times 10^3}{4.0 \times 10^3 + 7.50 \times 10^3} \times 0.095 - \dfrac{4.0 \times 10^3- 7.50\times 10^3}{4.0 \times 10^3+ 7.50\times 10^3} \times 0.095 = 0.095$

$v_2 = \dfrac{ 4.0 \times 10^3 - 7.50\times 10^3}{4.0 \times 10^3 + 7.50 \times 10^3} \times 0.095 + \dfrac{2 \times 7.50\times 10^3}{4.0 \times 10^3+ 7.50\times 10^3} \times 0.095 = 0.095$

The final relative velocity of the satellite, $v_f$ = v₁ + v₂

∴ $v_f$ = 0.095 + 0.095 = 0.190

The final relative velocity of the satellite, $v_f$ = 0.190 m/s

4 0

3 years ago

If something is 50% efficient, how many joules of wasted energy will there be if 750J of energy is put in?

Andreas93 [3]

Answer:

375 J

Explanation:

Total energy = 750 J

Efficiency = 50%

Wasted energy = 50% [100% - 50%]

Amount of wasted energy

= 750 x 50%

= 750 x 0.5

= 375 J

7 0

2 years ago

Read 2 more answers

What is the block of 10 columns in the

LenKa [72]

B. transition metals for sure

7 0

3 years ago

The applied force required to push something across a surface as friction increases is what?

katovenus [111]

Is proportional to the value of the normal force acting on the object.

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3 years ago

A physicist wants to measure the force required to push a heavy box up a ramp. What tools might the physicist use? What measurem

Flauer [41]

Answer:

Dynamometer

Explanation:

We might want to use a system that calculates weight, but we would need to change it for the task, depends entirely on the task. Let 's imagine we're taking a scale to test people's weight, and you're moving it between something that moves the box and the box that are being moved, because when we push you will see the scale calculate distance. Then force until the container continues to flow.

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3 years ago