Answer:
Explanation:
Given
Height from which cart is released is
as we know energy is Conserved and changes only its form so Potential Energy of Cart converted to kinetic Energy at bottom
Energy at Top
where m=mass of cart
g=acceleration due to gravity
h=height of track w.r.t bottom
Energy at bottom
cancel out common terms
c. II and III only (the object has 0 acceleration and the object has constant velocity.)
Why?
Let's discard each of the given options to find the correct one(s).
<h3>
- There are no forces acting on the object:</h3>
False, if an object has a constant speed, it does not mean that there are no forces acting on it, in fact, there will be always acting forces, like frictional force, gravity force, air resistance, and others.
<h3>
- The object has a 0 acceleration:</h3>
True, in an object is moving at constant speed, it means that there is no acceleration, the speed will be the same all the time during motion.
<h3>
- The object has constant velocity:</h3>
True, <u>if an object is moving in a straight line at constant speed</u> the velocity will be also constant. The velocity of an object is referring to its speed and its direction, if the object is moving in a straight line, the direction will be the same, so, if the speed is constant, the velocity will be also constant.
Have a nice day!
You expend 1000 w of power moving a piano 10 meters in 5 seconds. how much force do you exert a. 50 n b. 50000 n c.250 n d. 500 n apex please
<em>P = W/t = (Fxd)/t and rearranging and solving for F, F = (Pxt) / d = (1000x5)/10 = 500 N, choice C.</em>
The answer is a constraint
Birth rate equation :
<h3>Further explanation</h3>
Population growth from an area can be based on death and birth as well as the migration of its population
Can be formulated simply
<h3>Pt = Po + (B - D)
</h3>
Pt = population at the end of the year
Po = population at the beginning of the year
B = Birth
D = Death
If you take into account the movement of the population:
<h3>Pt = Po + (Births + Immigration) - (Deaths + Emigration)
</h3>
Birth Rate shows the number of births per 1000 population in that year
We can use the Crude Birth Rate (CBR) calculation
The formula used
A population has 1000 individuals. Over a period of 1 year, 500 new individuals are born.
number of births = 500
total population in the middle of the year (assumed) = 1000 + 250 = 1250
<h3>Learn more</h3>
high birth rates
brainly.com/question/8646958
Keywords : birth rate, population, 1 year, equation
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