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3 years ago

13

If the forces acting on a soccer ball are balanced , what should happen to the motion of the ball? A The ball will fall to the g

round 00 The ball wil bounce up and down. The ball will rise toward her head. The ball will not move .

2 answers:

lukranit [14]3 years ago

5 0

That’s what she said

m_a_m_a [10]3 years ago

5 0

Answer:

A

Explanation:

i took the test trust me:)

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Using the midpoint and the distance formulas, calculate he coordinate of the midpoint and the length of the segment.

arsen [322]

Answer:

Explanation:

Formula to calculate the distance between two points $(x_1,y_1)$ and $(x_2,y_2)$ is,

d = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Therefore, length of CD having coordinates C(3,1) and D(3, 3),

CD = $\sqrt{(3-3)^2+(1-3)^2}$

= 2 units

Formula to find the midpoint of CD is,

M = $(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

= $(\frac{3+3}{2},\frac{1+3}{2})$

= (3, 2)

Therefore, length of CD = 2 units and (3, 2) are the coordinates of the midpoint of CD.

7 0

4 years ago

A ramp is needed to allow vehicles to climb a 2 foot wall. The angle of elevation in order for the vehicles to safely go up must

stepan [7]

Answer:

Yes the ramp can be safely used

Explanation:

Here, we have

Length of longest ramp = 5 ft

Height of wall = 2 ft

Therefore, the sine of the angle adjacent to the ramp which is equal to the angle of elevation is given by;

$Sin\theta = \frac{Opposite \, side \, to\, angle}{Hypothenus\, side \, of\, triangle}$

Where:

The opposite side to angle = 2 ft wall and

Hypotenuse side = Ramp = 5 ft

Therefore,

$Sin\theta = \frac{2}{5} = 0.4$ and θ = sin⁻¹0.4 = 23.55 °

The ramp can be safely used as the angle it is adjacent to is less than the specified 30°.

5 0

4 years ago

A substance of unknown mass absorbs 138 kilojoules of energy, going from 298 to 303 kelvin. if the specific heat of the substanc

AveGali [126]

Heat absorbed to raise the temperature is given by

$Q = mc\Delta T$

here

m = mass

c = 7.11 J/g C

$\Delta T = 303 - 298 = 5 kelvin$

Q = 138 KJ

Now by using the above formula we will have

$138 * 10^3 = m* 7.11 * 5$

$m = 3881 gram$

$m = 3.88 kg$

So the amount of the substance will be 3.88 kg

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4 years ago

Describe an example of newton’s 3rd law of motion

professor190 [17]

Answer:

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.

Explanation:

8 0

3 years ago

The paper clip has _______ forces acting on it.

eimsori [14]

the correct answer is unbalanced because if it was balanced it would be floating because it would have no push or pull force.

5 0

3 years ago