3 years ago

Breathing techniques should be used

Physics

1 answer:

Crank3 years ago

4 0

Can you tell us the question so we can answer?

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Find the velocity of a dropped brick after 5.0 s using v =a ∆ t and a = - 9.8 m/s^2

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Answer:

Explanation:

9.8 x 5 = 49

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3 years ago

When do you produce more pressure on the ground...standing or laying down?

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When you are Standing you produce more pressure on the ground

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3 years ago

Bonus Points. A ball was thrown straight up in the air from 1.2 meter above the grouind. After 3 seconds the ball returnes to th

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Answer:

Explanation:

given that

Distance above the ground, s = 1.2 m

Time taken by the ball, t = 3 s

Velocity of the ball, v = 1.2/3 = 0.4 m/s

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H = 0.16 / 19.6

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3 years ago

When recyclable materials are sent to a recycling plant, they are often not sorted in any particular way. Plastic materials migh

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4 years ago

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A 0.2 kg plastic cart and a 20 kg lead cart both roll without friction on a horizontal surface. Equal forces are used to push bo

Fynjy0 [20]

Answer:

Equal

Explanation:

The impulse theorem states that the impulse exerted on each cart is equal to the change in momentum of the cart:

$I=\Delta p=p_f -p_i$

where

I is the impulse

pf is the final momentum

pi is the initial momentum

The impulse is equal to the product between the force applied and the contact time:

$I=F\Delta t$

In this case, the force applied to the two carts (F) is the same, and the contact time ( $\Delta t$ ) is the same as well. Therefore, the impulse exerted on the two carts is the same.

Moreover, the initial momentum of the two carts is also the same (zero, because they start from rest: $p_i=0$ ). So the formula becomes

$p_f = I$

And since I is the same for the two carts, the final momentum ( $p_f$ ) will also be equal.

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3 years ago