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viva [34]
3 years ago
5

gAn Olympic diver is on a diving platform 5.40 m above the water. To start her dive, she runs off of the platform with a speed o

f 1.17 m/s in the horizontal direction. What is the diver's speed, in m/s, just before she enters the water
Physics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

The diver's speed, in m/s, just before she enters the water = 10.19 m/s

Explanation:

Assuming the horizontal velocity of the diver remains constant by neglecting the air resistance.

V^2 = U^2 + 2as

Where, V^2 = the diver's final velocity before impact with the water

            U^2 = Initial diver's velocity as she leaves the diving platform

                a = acceleration due to gravity

                s = the displacement

V =  √U^2 + √2as

= √(5.40 m/s)^2 + √2(9.81 m/s/s) (1.17 m)  

= √ 29.16 + √ 22.9554

=  5.40 + 4.79

= 10.19 m/s

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borishaifa [10]
<h2>The rank is : P_B>P_A=P_C .</h2>

We need to rank the objects according to the magnitude of their momentum.

We know momentum ,P = m\times v{ here m is mass and v is velocity }

Momentum of object A , P_A = m v.

Momentum of object B , P_B= \dfrac{m}{2}\times4v=2\ mv.

Momentum of object C  , P_C= 3m\times\dfrac{v}{3}=mv.

Now, we can rank them in order of  their magnitude of momentum .

P_B>P_A=P_C.

Hence, this is the required solution.

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If for every action force an equal and opposite reaction force exlsts, how can anything ever be accelerated?
klasskru [66]

Answer:

B

Explanation:

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3 0
2 years ago
A 10 kg package is delivered to your house.
kolbaska11 [484]
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A 0.0663 kg ingot of metal is heated to 241◦C
Westkost [7]

Answer:280.216j/kg°C

Explanation:

Mass of metal=0.0663kg

mass of water=0.395kg

Final temperature=27.4°C

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Temperature of water=25°C

specific heat capacity of water=4186j/kg°C

0.0663xax(241-27.4)=0.395x4186x(27.4-25)

0.0663xax213.6=0.395x4186x2.4

14.16168a=3968.328

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a=280.216j/kg°C

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2 years ago
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