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2 years ago

A plane starting at rest at one end of a runway undergoes a uniform acceleration of 4.8 m/s

Physics

1 answer:

yKpoI14uk [10]2 years ago

8 0

initial velocity=0m/s=u
Acceleration=a=4.8m/s^2
Time=t=15s

Final velocity be v

$\\ \sf\longmapsto v=u+at$

$\\ \sf\longmapsto v=0+4.8(15)$

$\\ \sf\longmapsto v=72m/s$

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2 years ago

A kettle is rated at 1 kW, 220 V. Calculate the working resistance of the kettle.

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Explanation:

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2 years ago

When a cannon fires a cannonball, the cannon will recoil backward because the:

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C) total linear momentum of the ball and cannon is conserved.

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2 years ago

A 4 kg toy car moves horizontally on a rough road with coefficient of kinetic friction 0.2. It accelerates from rest to 20 m/s i

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The total work done on the car is 784Joule.

<h3>What's the acceleration of the car?</h3>

As per Newton's equation of motion, V= U+at
U= initial velocity= 0 m/s

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t= time = 10s

a= acceleration

So, 20= 0+ 10a

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<h3>What's the distance covered by the car in 10 seconds?</h3>

As per Newton's equation of motion,

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S= distance covered by the car
So, 20²-0=2×2×S=4S

=> 400= 4S

=> S= 400/4= 100m

<h3>What's the work done on the car due to frictional force?</h3>

Work done by frictional force= frictional force × distance

= (0.2×4×9.8)×100

= 784Joule

Thus, we can conclude that the work done on the car is 784Joule.

Learn more about the work done here:

brainly.com/question/25573309

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1 year ago

A student has a thin copper beaker containing 100 g of a pure metal in the solid state. The metal is at 215°C, its exact melting

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Answer:

The metal will melt but their will be no change in temperature.

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2 years ago