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Svet_ta [14]
4 years ago
6

Captain hook orders peter pan to walk the plank from which he falls into the sea 18m below. Peter pan claims that his life flash

ed before his eyes during his fall. How much time is available for this?
Physics
2 answers:
Neporo4naja [7]4 years ago
6 0
You would use
d = v0*t + 0.5at^2
Solve for t. v0 is 0, d is 18 and a is -9.81

t = sqrt(18/4.9)
Nat2105 [25]4 years ago
3 0
The distance fallen through gravity in ' t ' seconds is

        Distance  =  (1/2) (acceleration of gravity) (t²)

           18 meters  =  (1/2) · (9.8 m/s²) · (t²)

Divide each side by (4.9 m/s²):

                           (18 m) / (4.9 m/s²)  =  t²

                                 3.67 sec²  =  t²

Square root each side:    1.92 sec  =  t  .    (rounded) 

That's not much time.  But Peter Pan never got old, so
presumably he hasn't got too much life to flash through. 
He may be OK with 1.92 seconds.  Maybe even enough
time to linger momentarily over some of the juicier parts.
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Answer:

c) up, less than the weight of the anchor

Explanation:

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When buoyancy is less than the force that the object is generating due to gravity the object sinks. Buoyancy always acts up.

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3 years ago
Chris and Jamie are carrying Wayne on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 100 N. Wayne weigh
BabaBlast [244]

Answer:

<h2>E. 650N</h2>

Explanation:

step one:

given

length of stretcher= 2m

weight of stretcher=100N

Wayne weighs =800N

distance of Wayne weighs from chris's end= 75cm= 0.75m

The force that Chris is exerting to support the stretcher, with Wayne on it, can be computed by taking moments of the weight of the stretcher and Wayne weighs  about Chris's end, the end result is the reaction at Chris's end

Taking moment about Chris's end

The moment of Wayne weight 75cm from Chris+ Half the weight of stretcher 1m from Chris

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650N

6 0
3 years ago
In the heat equation, what does c represent?
padilas [110]

Answer:

specific heat of the substance

4 0
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As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box and the
In-s [12.5K]

Answer:

It is conserved

Explanation:

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4 0
3 years ago
If a rock is dropped with a weight of 50kg and friction due to air resistance produces a force of 98N, what is the net force in
bearhunter [10]

Answer:

The net force is 392N, pointing down.

Explanation:

The net force is the sum of all forces acting on the rock, namely the gravity ("+" acting downward) and the friction force due to air resistance ("-" acting upward):

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The net force is 392N and pointing down (positive)/

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4 years ago
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