An electric train is moving north at 100mph and a wind is blowing to the west at 10mph. Which way does the smoke blow?
2 answers:
Hey!
Hope this helps...
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Okay... so we know that the train is moving north, which means the Apposing wind (and Friction) would be coming from the south.
We also know that the wind is coming from the West.
And based upon this information, we know that the Smoke has to be going South West because when an Apposing wind is pushed by a natural wind, the object being affected by both winds moves in both directions (a.k.a. diagonal)...
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If you need to explain anything, please ask, I also recommend looking at the photo I made below...
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Consecutive angles in a paralleogram have sum 180
And
- 7y+3+86=180
- 7y+89=180
- 7y=91
- y=13
And
opposite angles are equal
- 6x+8=86
- 6x=78
- x=13
Answer:
a) The maximum height is approx 15.5 unit.
b) The time it will take for Joey to reach the water is 1.45 hour.
Step-by-step explanation:
Given : When Joey dives off a diving board, the equation of his pathway can be modeled by
To find : a) Find Joey's maximum height.
b) Find the time it will take for Joey to reach the water.
Solution :
Modeled ....(1)
a) To find maximum height
Derivate (1) w.r.t. t,
For critical point put h'=0,
Derivate again w.r.t. t,
It is maximum at t=0.46875.
Substitute t in equation (1),
The maximum height is approx 15.5 unit.
b) To find the time it will take for Joey to reach the water.
Put h=0 in equation (1),
Apply quadratic formula,
Here, a=-16 , b=15, c=12
Reject negative value.
The time is t=1.45.
The time it will take for Joey to reach the water is 1.45 hour.