Question 1 (1 point)
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the path a projectile takes is known as the

question 1 options:

vertical component

trajectory

horizontal component

parabola

question 2 (1 point)
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which of the following is not an example of a projectile?

question 2 options:

a baseball that has been pitched

a rock being thrown over a bridge

a person sitting in a chair, not moving

a car driving off a cliff

question 3 (1 point)
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a plane is flying east when it drops some supplies to a designated target below. the supplies land after falling for 10 seconds. how high above the ground was the airplane when the supplies were dropped? (hint: d = 1/2gt2; g = -9.8 m/s2)

question 3 options:

120 meters

490 meters

980 meters

49 meters

question 4 (1 point)
as the supplies fell, they traveled 650 meters horizontally. how fast were the supplies and the airplane moving forward? remember that it took 10 seconds for them to reach the ground. (hint: v = d/t)

question 4 options:

65 m/s

6500 m/s

0.154 m/s

660 m/s

question 5 (1 point)
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a projectile has a vertical component and a horizontal component.

question 5 options:
true
false
question 6 (1 point)
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the shape of a projectile's trajectory is an ellipse.

question 6 options:
true
false
question 7 (1 point)
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which of the following is not true about a vertical component?

question 7 options:

the vertical component of a projectile changes due to gravity.

the vertical component acts the same as an object in free fall.

the vertical component always equals the horizontal component.

question 8 (1 point)
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during the course of trajectory, the horizontal component of the velocity is

question 8 options:

constant

increasing

decreasing

negative

question 9 (1 point)
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in the simulation above, as the projectile travels upward, how does the vertical velocity change?

question 9 options:

vertical velocity remains the same.

vertical velocity decreases.

vertical velocity increases.

vertical velocity is zero.

question 10 (1 point)

in the simulation above, as the projectile travels downward, how does the vertical velocity change?

question 10 options:

vertical velocity remains the same.

vertical velocity decreases.

vertical velocity is zero.

vertical velocity increases.

The path a projectile takes is known as the Trajectory

Trajectory is the curved path that an object follows when it travels in space. It has two components x and y. X shows the range while y shows the height  

The odd choice is A person sitting in a chair, not moving

As the name suggests, projectile motion is a type of motion. The person sitting in a chair is not moving and he is in rest so he cannot be taken into motion category.

490 meters

According to second equation of motion

S= vit + ½ gt²

Putting the values

S = 0 + ½ (9.8) (10)

S = 490 meters

The sped is 65m/s

As we know that

Speed = Distance / Time

So putting the values

Speed = 650 / 10

Speed = 65 m/s  

The statement is true

A projectile motion is composed of two components. X component is responsible for showing the range and Y component is responsible for the height of the projectile.  

The given statement is false

The shape of projectile graph is a parabola, not an ellipse. The equatuion of a projectile gives us two values because it is a quadratic equation so that is why this type of motion gives parabola and not an ellipse.

The vertical component always equals the horizontal component.

The horizontal component of a projectile is X and it is constant which means no force is acting on it whereas y component has a force of gravity so both of these components can never be the same.

During the course of trajectory, the horizontal component of the velocity is constant

The horizontal component of trajectory is the X component. This component does not have any force upon it except the force of friction of earth and object. The friction force is also acting in x axis that is why we can say that during the course of trajectory, the horizontal component of the velocity is constant .

In the simulation above, as the projectile travels upward,its vertical velocity decreases

Whenever an object moves against the force of gravity, it’s acceleration and velocity decreases because the gravitational pull tends the object to stay it on earth surface.

In the simulation above, as the projectile travels downward,  the vertical velocity increases

As the body comes towards the earth the gravitational acceleration increases with the rate of 9.8m/s². This acceleration is taken as positive and when the projectile hits the ground it is in its maximum speed.

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation