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Dima020 [189]
4 years ago
12

HELPPPPP!!!!!

Physics
1 answer:
leva [86]4 years ago
3 0

Answer:

Option C

Maximum potential energy is at point R.

Explanation:

Potential energy is a product of mass, acceleration due to gravity and height ie

PE=mgh where PE is the potential energy, m is mass of an object, g is acceleration due to gravity whose value is normally taken as 9.81 and h is height. Since at point R we have the maximum height, the potential energy will be highest at this point.

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If a distance-time graph contains the point (4, 15), what does that tell you about the runner?
serg [7]

Explanation:

It is given that there is distance time graph. The slope of any distance time graph will give the speed or velocity of the object.

In the context, it is seen that there is a point in the distance - time graph. And the values of the point in the graph is (4,15).

Now here, the distance is plotted in the  ordinate or the vertical y-axis while time is plotted in the abscissa or the horizontal x-axis.

Thus the point (4,15) tells us that the object has traveled 15 units in time equal to 4 seconds.

5 0
3 years ago
A projectile is fired at an angle such that the vertical component of its velocity
mestny [16]

Answer:

<em>It takes 3 seconds to reach its high point</em>

Explanation:

<u>Projectile Motion</u>

In a projectile motion (or 2D motion), the object is launched with an initial angle θ and an initial velocity vo.

The components of the velocity are

v_{ox}=v_o\cos\theta

v_{oy}=v_o\sin\theta

The speed in the horizontal direction at any time t is:

v_y=v_o\sin\theta-g.t

The time taken to reach the maximum height is when vy=0, or:

\displaystyle t_m=\frac{v_o\sin\theta}{g}

We are given the y-component of the velocity, thus:

\displaystyle t_m=\frac{30~m/s}{10~m/s^2}

t_m=3~s

It takes 3 seconds to reach its high point

3 0
3 years ago
5. SEP Construct Explanations Why are
musickatia [10]

The distribution of the fossil fuel depends on the factors like land, temperature, altitude and so on. Because of the difference in all these factors in different areas, there is unequal distribution of fossil fuels.

<u>Explanation:</u>

The problem of allocation of resources arises due to the scarcity of resources, and refers to the question of which wants should be satisfied and which should be left unsatisfied. Because of the scarcity of resources in some areas, there is low production and therefore low growth in that area.

Most natural resources, including fossil fuels, are not distributed evenly around the Earth. Deposits of fossil fuels depend on the climate and organisms that lived in that region millions of years ago, and the geological processes that have since taken place.

3 0
4 years ago
1 Item 1 Item 1 1.25 points circular ceramic plate that can be modeled as a blackbody is being heated by an electrical heater. T
Elena L [17]

Answer:

174.85 W

Explanation:

Area of plate = 3.14 x (15x 10⁻²)²

= 706.5 x 10⁻⁴ m²

heat being radiated by convection = 12 x 706.5 x 10⁻⁴ ( 180 - 15 )

= 139.88 W. This energy needs to be fed by heat source to maintain a constant temperature of 180 degree.

If power of electric source is P

P x .8 = 139.88

P = 139.88 / .8

= 174.85 W

6 0
3 years ago
Which sizes influence the adhesive and rolling friction?
julsineya [31]

juju on that beat

Explanation:

4 0
3 years ago
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