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3 years ago

An object in projectile motion will follow which path?

Physics

2 answers:

Novosadov [1.4K]3 years ago

5 0

Answer:

curved down toward the ground

Explanation:

A projectile movement is a movement composed of a horizontal movement and a vertical movement. According to Galileo, if an object presents a compound movement, each of the component movements is performed as if the others did not exist and in the same interval of time. This is the principle of simultaneity.

When an object is cast horizontally, it describes a parabolic movement in relation to the Earth. Accordingly, we can conclude that an object in projectile motion will follow a curved path to the ground.

likoan [24]3 years ago

3 0

It will shape a parabola

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John throws a rock down with speed 14 m/s from the top of a 30 m tower. If air resistance is negligible, what is the rock's spee

astra-53 [7]

The final velocity of the rock before it touches the ground is 28 m/s.

Answer:

Explanation:

As the rock is thrown down, this means the acceleration due to gravity will be exerting on the rock. So the rock will be exhibiting a free fall motion. Thus, the acceleration of the rock will be equal to the magnitude of acceleration due to gravity. Then using the third equation of motion, we can determine the final velocity of the rock provided the values for initial velocity, displacement and acceleration is given in the problem itself.

So the acceleration is equal to 9.8 m/s² due to its free fall motion and displacement will be equal to the height of the tower which is given as 30 m. And the initial speed of the rock is stated as 14 m/s. The initial speed is represented as u, final speed is represented as v, displacement is represented as s and acceleration is represented as a.

$2as=v^{2}-u^{2}$

Then, 2 × 9.8 × 30 = v²-(14)²

v²=784

v= 28 m/s

So the final velocity of the rock before it touches the ground is 28 m/s.

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4 years ago

Why is the Copernican Revolution significant? Check all that apply.

k0ka [10]

Answer:

2.Scientists discovered new evidence to support their theories.

3.Scientists discovered that old interpretations of data was incorrect.

4.Scientists used observations and mathematical data to solve problems in new ways.

Explanation: Here you go

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3 years ago

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If a data point is way off the trend line, what will not resolve the problem?

Elden [556K]

Going out to a movie will not resolve the problem.

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3 years ago

What would make oppositely charged objects attract each other more? increasing the positive charge of the positively charged obj

kykrilka [37]

Answer:

Explanation:

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3 years ago

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Suppose a 350-g kookaburra (a large kingfisher bird) picks up a 75-g snake and raises it 2.5 m from the ground to a branch. (a)

mafiozo [28]

(a) The work done by the bird to raise the snake on the branch is equal to the product between the weight of the snake and the height of the branch above the ground:

$W_1 = mg h$

where $m=75 g=0.075 kg$ is the mass of the snake and $h=2.5 m$ is the height of the branch with respect to the ground. Substituting numbers into the equation, we find

$W_1 = (0.075 kg)(9.81 m/s^2)(2.5 m)=1.84 J$

(b) The work the bird did to raise its own centre of mass from the ground to the branch is equal to the product between the bird's weight and the height of the branch:

$W_2 = mgh$

where $m=350 g=0.35 kg$ is the mass of the bird. Substituting numbers into the equation, we find

$W_2 = (0.35 kg)(9.81 m/s^2)(2.5 m)=8.58 J$

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3 years ago