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3 years ago

Write the law of conservation of energy. How does it apply to eating and exercising?

1 answer:

5 0

The Law of Conservation of energy states that the total energy of an isolated system remains constant-it is said to be the conserved over time. It applies by us burning calories because humans can lose or gain weight.

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An object rotates about a fixed axis, and the angular position of a reference line on the object is given by θ = 0.220e3t, where

OLga [1]

Answer: $a_{t}=3.96$

$a_{c}=0.8712$

Explanation:

Given

$\theta =0.220e^{3t}$

r=2cm

Now angular velocity is given by $\omega =\frac{\mathrm{d}\theta}{\mathrm{d}t}$

$\omega =0.66e^{3t}$

Now linear velocity(v) is given = $\omega r$

$v=1.32e^{3t}$

Now tangential component of acceleration is given by

$a_{t}=\frac{\mathrm{d}\vec{v}}{\mathrm{d}t}=3.96e^{3t}$

at t=0

$a_{t}=3.96cm/s^2$

radial component of acceleration is given by

$a_{c}=\omega ^{2}r$

$a_{c}=0.4356e^{6t}\times 2$

$a_{c}=0.8712e^{6t} cm/s^{2}$

at t=0

$a_c=0.8712 cm/s^{2}$

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3 years ago

How do water and gravity work together to erode soil, sediment, and rock?

TiliK225 [7]

Gravity can cause water to move down and carry sediment and rocks along the bottom. if the water slows down, it drops the rocks and if it floods a field then the grass will also filter smaller particles out leaving fine sediment behind. In addition to it the fast flow of water can cause erosion, over time it can cause valleys as well.

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3 years ago

5 examples of neutons 3rd law of motion

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Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices.

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3 years ago

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The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.

xenn [34]

Answer:

True

Explanation:

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3 years ago

It's always a good idea to wear a seatbelt in a car, because if the car comes to a sudden stop, you will not _________.

IgorLugansk [536]

It's always a good idea to wear a seatbelt in a car, because if the car comes to a sudden stop, you will not move forward very much since the seatbelt is holding you back. The answer is letter D.

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3 years ago