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 (10 points)
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 (10 points)
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 (10 points)
a projectile has a vertical component and a horizontal component.

question 5 options:
true
false
question 6 (10 points)
the shape of a projectile's trajectory is an ellipse.

question 6 options:
true
false
question 7 (10 points)
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.

2). If the person is just sitting there and not moving, then he certainly can't be a projectile.

3). The formula to use is right there under the question.  D = 1/2 g t² .               'g' is 9.8 m/s².  Write " 9.8 m/s² " in place of 'g' in the formula.  't' is 10 seconds.  Write " 10 seconds " in place of 't' in the formula.  then the formula will tell you what 'D' is, and that's the answer to Question 3.  I got 490 meters in my head, but you need to check this.

4). The formula to use is right there under the question.  v = d / t .           'd' is 650 meters.  Write " 650 meters " in place of 'd' in the formula.  't' is 10 seconds.  Write " 10 seconds " in place of 't' in the formula.  Then the formula will tell you what 'v' is, and that's the answer to Question 4.  I got 65 m/s in my head, but you need to check this.

5).  Technically, this statement is false.  The projectile does not have a vertical or horizontal component.  But the projectile's displacement, velocity, and acceleration all do.  (At least they do while it's flying.)

6).  The shape of a projectile's trajectory is a parabola.

7).  The vertical component of a projectile depends on who designed it.  The vertical components of the projectile's displacement, velocity, and acceleration are the same as the vertical components of the displacement, velocity, and acceleration of any other object in free-fall.  (If you ignore air resistance.)

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.