Kinetic energy as she hits the water is 3300 joule.
To find the answer, we need to know about the Newton's equation of motion.
<h3>What's the Newton's equation of motion to determine the final velocity?</h3>
- The final velocity is determined as
V²=U²+2aS
- V= final velocity, U= initial velocity, a= acceleration and S= distance
<h3>What's the final velocity of the driver falling from 3.10m with initial velocity of 6.10m/s?</h3>
- Here, a= 9.8m/s², U= 6.10m/s and S= 3.10m
- So, V²= 6.1²+2×9.8×3.10= 98
- V= √98= 10m/s
<h3>What's the kinetic energy of the driver when touches the water?</h3>
Kinetic energy= 1/2×mass×velocity²
= 1/2 × 66 × 10²
= 3300J
Thus, we can conclude that the kinetic energy of the driver is 3300 Joule.
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14.8m/s is minimal horizontal velocity must the cliff divers leave the top of the cliff is they are to miss the rock.
Ledge divers in Acapulco leap into the water from a 36-meter-high cliff. A rock protrudes 10.4 meters horizontally from the water, level. 9.8 m/s2 is the acceleration of gravity. If the cliff divers are to miss the rock, they must depart from the top of the cliff with a minimal horizontal velocity.
from above statements, we assume that
there is no initial vertical velocity, then we calculate the time it takes to reach the water, then divide the horizontal distance by that time to get the minimum required horizontal speed.
h=gt^2/2
h= 36 m
t =
put h = 36 m g = 9.8 m/s^2
t=2.7 second
Then the minimum required horizontal velocity is
v = d/t
by putting value
v= 10.4 m/2.7 s
v=14.8m/s
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The advantage of using parallax rather than the doppler effect to determine star distance is :
Parallax is more accurate for stars that are very far away
Doppler is really velocity dependant and only effective to measure the one that is in shorter distance
hope this helps
She remains the only person to be honored for accomplishments in two separate sciences. Curie received the Nobel Prize in Physics in 1903, <u>along with her husband and Henri Becquerel, </u>for their work on radioactivity.
<h3>What did Marie Curie discover?</h3>
Relentless regardless of a vocation of truly requesting and at last lethal work, she found polonium and radium, supported the utilization of radiation in medication and essentially changed how we might interpret radioactivity. Curie was conceived Marya Skłodowska in 1867 in Warsaw.
- Curie was the first person to win two Nobel Prizes.
- She managed it all without a fancy lab.
- Nobel Prizes were a family affair.
- Curie was the first female professor at Sorbonne University.
- Curie is buried in the Panthéon in Paris.
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