How can you calculate distance when given power, time, and mass?Power used to lift crate is 3490, mass of crate is 425 kg, time is 3 seconds. How far was the crate lifted?
Answers
First step: Power = (work done) / (time to do the work).
3490 watts = (work done) / (3 seconds)
3490 joules/second = (work done) / (3 seconds)
Multiply each side by 3 seconds:
Work done = (3490 x 3) joules = 10,470 joules
Second step: Weight = (mass) x (gravity)
Weight of the crate = (425 kg) x (9.8 m/s²)
= 4165 newtons
Step 3: Work done = (force) x (distance)
= (weight) x (distance lifted)
10,470 joules = (4165 newtons) x (distance)
Divide each side by 4165 newtons:
Distance = 10,470 kg-m²/sec² / 4165 kg-m/s²
= 2.514... meters (rounded)
You asked: "How can you calculate ... ?"
Notice that I did the same thing in all 3 steps ... write down the formula
for finding a quantity, then write the numbers you know into the formula
to find the quantity.
THAT's "how", and it all boils down to knowing the formulas and picking
the right one to work with. The right one to pick is the one that talks about
all (or most) of the quantities that you know AND the quantity that you're
trying to find.
For example, if you need to find how long it will take your turtle to walk
across the room, then you need a formula that talks about time, speed,
and distance. You would not get much help from the formula that talks
about the pressure and volume of a gas, or one that talks about the
frequency and wavelength of light waves, or Einstein's formula E=mc²
for the equivalency of mass and energy.
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The Human body system that work together for support, protection and movement is ; ( B ) The skeletal system and muscular system
The skeletal system provides support for every other system present in the human body and it also gives the organism its shape as well. while the muscular system protects the vital internal organs from external shocks.
Both Skeletal and muscular system provide movement, support and protection for the Human body because without any of these the human body cannot make movements or support itself efficiently.
Hence we can conclude that The Human body system that work together for support, protection and movement is The skeletal system and muscular system.
Learn more : brainly.com/question/21835432
Answer:
B.
Explanation:
Support and Movement involves the skeletal and Muscular system.
Answers
Think about this, if you drop a feather and a marble from the same beginning point then they will both fall at the same rate. This is because, mass doesn't affect the speed of falling objects, however, if there are other factors involved other than gravity then the answer may vary.
Hope this helped
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Answer:
2000 Joules
Explanation:
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Answers
As per the question, the object is thrown in vertically upward direction.
The initial velocity of the ball [u] = 9 m/s.
We are asked to calculate the velocity of the ball after 2 second.
When the ball goes up, the only force that acts on the ball is the force of gravity.
Hence the acceleration of the ball is nothing else than acceleration due to gravity i.e g and it is downward in direction.
Here, it will be considered negative as it is downward in direction .
From equation of kinematics we know that-
v = u +at [Here v is the final velocity and a is the acceleration.
= 9 +[-9.8]×2 m/s
= 9-19.6
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Here the negative sign indicates that the ball is falling downward. It is coming back after reaching its maximum height.
Here the total time of flight of the ball is-
If the ball is thrown from certain height from the ground, then the velocity of the ball will be the calculated value.
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B. Reflection gratings on plastic
C. Transmission gratings on glass
D. Replica transmission gratings on plastic
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Final answer:
Holographic gratings are likely to produce the brightest spectra.
Explanation:
The correct answer is A. Holographic gratings are likely to produce the brightest spectra. Holographic gratings are created using interference patterns produced by laser light, resulting in highly precise and bright spectra. Reflection gratings on plastic (option B), transmission gratings on glass (option C), and replica transmission gratings on plastic (option D) can also produce spectra, but holographic gratings are known to have superior brightness and quality.
Learn more about Holographic gratings here:
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