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3 years ago

30 POINTS!!!! PLEASE HELP ME!!!!!

Physics

1 answer:

aksik [14]3 years ago

3 0

Answer:

left column: If you can see some animals, you may see a bird with a fruit or nut in its beak. Once it lets go of the object, it drops due to gravity. If a fruit drops from a tree with examples like in Newton's famous example, it is also due to gravity.

Explanation:

withxamples too.)Right column: Think about it like the moon, you wouldn't be able to walk, just float around. If to simply try to put food on a plate, it wouldn't stay. Sitting down at your table to attend class. You'd float away along with your laptop.(you come up wiht e

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Explanation:

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3 years ago

A child on a tricycle is moving at a speed of 1.40 m/s at the start of a 2.25 m high and 12.4 m long incline. The total mass is

goblinko [34]

Answer:

The work done by the child as the tricycle travels down the incline is 416.96 J

Explanation:

Given;

initial velocity of the child, $v_i$ = 1.4 m/s

final velocity of the child, $v_f$ = 6.5 m/s

initial height of the inclined plane, h = 2.25 m

length of the inclined plane, L = 12.4 m

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The work done by the child is calculated as;

$\Delta E_{mech} = W - f_{k} \Delta L\\\\W = \Delta E_{mech} + f_{k} \Delta L\\\\W = (K.E_f - K.E_i) + (P.E_f - P.E_i) + f_{k} \Delta L\\\\W = \frac{1}{2} m(v_f^2 - v_i^2) + mg(h_f - h_i) + f_{k} \Delta L\\\\W = \frac{1}{2} \times 48(6.5^2 - 1.4^2) + 48\times 9.8(0-2.25) + (41\times 12.4)\\\\W = 966.96 \ - \ 1058.4 \ + \ 508.4\\\\W = 416.96 \ J$

Therefore, the work done by the child as the tricycle travels down the incline is 416.96 J

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3 years ago