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2 years ago

To win the game, a place kicker must kick a

Physics

1 answer:

jonny [76]2 years ago

3 0

The answer to the question is that the vertical distance the ball clear the cross bar is 1.465 metres.

We have horizontal distance as 28 m, and velocity as 18 m/s and the angle of projection 46.8 degree.

so, we can say that

In horizontal direction,

28 = (18 cos 46°) t

t = 2.2723 seconds

Now, in vertical direction,

Let be the height of the ball

h = (18 sin 46°)t - (1/2)gt²

h = (18 sin 46°)t - 4.9t²

h = ( (13.1214) × (2.2723) ) - ( (4.9) × (2.2723)² )

h = 4.5154 metre

Vertical distance the ball clear the cross bar = h - 3.05

Vertical distance the ball clear the cross bar = 4.5154 - 3.05

Vertical distance the ball clear the cross bar = 1.465

Thus, we can conclude that after solving and applying the concepts of projectile motion we find out the vertical distance the ball will clear the cross bar is 1.465 metres.

Learn more about Projectile Motion here:

brainly.com/question/10343223

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List the charge, location, and mass of a proton, a neutron, and an electron.

olya-2409 [2.1K]

Atoms consist of protons, neutrons and electrons

Explanation:

There are three particles in an atom:

Proton: it is located in the nucleus. Its mass is $m_p = 1.6726\cdot 10^{-27}kg$ , and it is positively charged (its electric charge is $+1.6\cdot 10^{-19}C$ , also called fundamental charge)
Neutron: it is also located in the nucleus. Its mass is slightly larger than the proton ( $m_n = 1.6749\cdot 10^{-27}kg$ ), and it has no electric charge. Protons and neutrons are held together inside the nucleus by the strong nuclear interaction
Electron: it is located outside the nucleus, in a region called "electron cloud". According to quantum mechanics, its exact position cannot be determined, but it can only be described by a "wave function" which gives the probability of finding the electron at a certain position. Its mass is much smaller than the proton ( $m_e = 9.11\cdot 10^{-31} kg$ ) and it is negatively charged (its charge is the opposite of that of the proton: $-1.6\cdot 10^{-19}C$ ).

Learn more about atoms:

brainly.com/question/2757829

#LearnwithBrainly

3 0

4 years ago

The current in some DC circuits decays according to the function I=I0e−t/τ, where I is the current at some point in time, I0 is

almond37 [142]

Answer: 1.95

Explanation:

You should start off from the decay formula and solve for τ:

$I = I_{0}e^{\frac{t}{\tau\\ } }$

$\frac{I}{I_{0}} = e^{\frac{-t}{\tau} }$

Apply inverse logarithmic function:

$ln(\frac{0.2 A}{1.2 A} ) = \frac{-t}{\tau}$

The final form will be:

$\tau=\frac{-3.5s}{ln(\frac{0.2A}{1.2A} )}$

Inputing values for I, IO, and t:

$\tau=\frac{-3.5S}{ln(\frac{0.2 A}{1.2 A} )} = 1.95$

3 0

4 years ago

The earth has a vertical electric field at the surface, pointing down, that averages 100 N/C. This field is maintained by variou

Kipish [7]

Answer:

The excess charge on earth's surface was calculated to be 4.56 × 10⁵ C

Explanation:

Using the formula for an electric field;

E = kQ/r²

k = 1/(4πε₀) = 8.99 × 10⁹ Nm²/C²

E = 100N/C

r = radius of the earth = 6400 km = 6400000m

Q = Er²/k = 100 × (6400000)²/(8.99 × 10⁹)

Q = 455617.4 C = 4.56 × 10⁵ C

Hope this helps!!!

6 0

3 years ago

Tasha has mass 20 kg and wants to use a 4.0-m board of mass 10 kg as a seesaw. her friends are busy, so tasha seesaws by herself

ELEN [110]

The 4 m board's center of mass is 2 m so the pivot point is somewhere between Tasha and 2 m (if you draw a picture it's going to make this clearer)

The mass of Tasha * her distance from the pivot point = the board's mass * distance from the pivot point.
 Let d1 be the distance Tasha is from the pivot point. The board's center of mass from the pivot point is 2 m - d1
 20 kg * d1 = 10 kg * (2m - d1)
 Solve for d1, you should get 2/3 of a m for the distance Tasha is from the pivot or support point. The center of mass for the board is 1 1/3 m from the support point.

8 0

3 years ago

judith weighs twice as much as Kristina.judith can run up a flight of stairs in 5 seconds while Kristina requires 10 seconds.com

Bumek [7]

Answer:

judith has power while

krsistina don't

8 0

3 years ago

Read 2 more answers