3 years ago

Describe the conditions that are necessary for mechanical energy to be a conserved quantity.

1 answer:

5 0

Mechanical energy is conserved when there are no non-conservative forces acting on the body. Examples are friction and elastic forces of stress in a body. These non-conservative forces convert mechanical energy to other forms of energy like heat and sound

Hope this makes sense

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Help on these 2 pls ASAP!!!!!!<br><br> BTW ITS A SCI QUESTION

kenny6666 [7]

Answer:

Net force

I think it’s balanced force

3 0

2 years ago

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A speed-time graph is a horizontal line with a y-value of 4. Which describes the objects motion?

taurus [48]

It means the speed is constant with a value of 4 units.

5 0

3 years ago

The function s(t) represents the position of an object at time t moving along a line. Suppose s (2 )equals 146and s (6 )equals

sineoko [7]

Answer:

v(t) = 27 units

Explanation:

The function s(t) represents the position of an object at time t moving along a line such that,

$s(2)=146$

and

$s(6)=254$

We need to find the average velocity of the object over the interval of time [2,6]. The velocity of the object is equal to the total distance divided by time. It is given by :

$v(t)=\dfrac{s(6)-s(2)}{6-2}$

$v(t)=\dfrac{254-146}{6-2}$

v(t) = 27 units

So, the average velocity of the object is 27 units. Hence, this is the required solution.

5 0

3 years ago

5. Steve is driving in his car to take care of some errands. The first errand has him driving to a location 2 km East and 6 km N

Sever21 [200]

Answer:

gshshs

Explanation:

hshsksksksbsbbshd

3 0

3 years ago

PLEASE HELP!! WILL GIVE POINTS

AURORKA [14]

Answer:

49 kg is the mass of the couch.

Explanation:

GPE = mgh

9800 = m * 10 * 20

9800 = 200m

m = (9800/20) = 49 m

Thenks and mark me brainliest :))

3 0

3 years ago