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2 years ago

11

It is harmful to settle near the airport why

1 answer:

Gemiola [76]2 years ago

4 0

Yes, plane accidents can happen near you, it can harm your property and cause a disaster.

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A small cart travels 20 meters to the right in 10 seconds calculate the velocity

stira [4]

The velocity would be 10

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2 years ago

A motorcycle is following a car that is traveling at a constant speed on a straight highway. Initially, the car and the motorcyc

Artist 52 [7]

Answer:

(a) 3.807 s

(b) 145.581 m

Explanation:

Let Δt = t2 - t1 be the time it takes from the moment when the motorcycle starts to accelerate until it catches up with the car. We know that before the acceleration, both vehicles are travelling at a constant speed. So they would maintain a distance of 58 m prior to the acceleration.

The distance traveled by car after Δt (seconds) at $v_c = 23m/s$ speed is

$s_c = \Delta t v_c = 23\Delta t$

The distance traveled by the motorcycle after Δt (seconds) at $m_m = 23 m/s$ speed and acceleration of a = 8 m/s2 is

$s_m = \Delta t v_m + a\Delta t^2/2$

$s_m = 23\Delta t + 8\Delta t^2/2 = 23 \Delta t + 4 \Delta t^2$

We know that the motorcycle catches up to the car after Δt, so it must have covered the distance that the car travels, plus their initial distance:

$s_m = s_c + 58$

$23 \Delta t + 4 \Delta t^2 = 23\Delta t + 58$

$4 \Delta t^2 = 58$

$\Delta t^2 = 14.5$

$\Delta t = \sqrt{14.5} = 3.807s$

(b)

$s_m = 23 \Delta t + 4 \Delta t^2$

$s_m = 23*3.807 + 58 = 145.581 m$

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2 years ago

A farmhand attaches a 25-kg bale of hay to one end of a rope passing over a

Georgia [21]

Explanation:

Newton's second law:

∑F = ma

277 N − 245 N = (25 kg) a

a = 1.28 m/s²

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2 years ago

Which of the following scenarios represents the best use of a scientific model?

valkas [14]

Answer:

Predicting weather patterns is the answer :-)

Explanation:

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2 years ago

13) A branch falling from a tree is to gravity as a car driving on the road is to A) a driver's foot off of the accelerator, coa

IgorC [24]

<span>a driver's foot off the accelerator and on the break pedal. C</span>

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2 years ago

Read 2 more answers