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mario62 [17]
2 years ago
6

A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound trai

n travels 16 miles per hour faster than the southbound train. After 1.5 hours, they are 174 miles apart. At what speeds are the two trains traveling?
Physics
2 answers:
SSSSS [86.1K]2 years ago
4 0

Answer:

50mph,60mph

Explanation:

Let speed of southbound train=x mph

Speed of northbound train,y=x+16 mph

Distance between two trains after 1.5 hour,174 miles.

We have to find the speed of two trains.

Distance=speed\times time

Using the formula

174=1.5x+1.5(x+16)

174=1.5(x+x+16)

174=(2x+16)\times 1.5

174=3x+24

3x=174-24=150

x=\frac{150}{3}=50mph

y=x+16=50+16=66mph

marta [7]2 years ago
3 0

Answer

Given,

Let the speed of the slower train be x mph.

speed of faster train be (x+16) mph.

time, t = 1.5 hr

d₁ = 1.5 x

d₂ = (x+16)× 1.5

both train are traveling in opposite direction

d₁  + d₂ = 174

1.5 x +  (x+16)× 1.5 = 174

3 x + 24 = 174

3 x = 150

x = 50

Speed of the slower train is 50 mph

Speed of the faster train is (50+16) = 66 mph.

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Answer:

72

Explanation:

The displacement of an object can be found from the velocity of the object by integrating the expression for the velocity.

In this problem, the velocity of the sport car is given by the expression

v(t)=3t^2-6t+24

In order to find the expression for the position of the car, we integrate this expression. We find:

x(t)=\int v(t) dt=t^3-3t^2+24t+C

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Here we want to find the displacement after 3 seconds. The position at t = 0 is

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While the position after t = 3 s is

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Answer:

μ = 0.375

Explanation:

F = Applied force on the trash can = 75 N

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F - f = 0

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Answer:

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Explanation:

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Put the value into the formula

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Here, \gamma-1=(\dfrac{1}{\sqrt{1-\dfrac{v^2}{c^2}}}-1)

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