The path a projectile takes is known as the question 1 options: vertical component trajectory horizontal component parabola question 2 (1 point) 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) 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) a projectile has a vertical component and a horizontal component. question 5 options: true false question 6 (1 point) the shape of a projectile's trajectory is an ellipse. question 6 options: true false question 7 (1 point) 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) during the course of trajectory, the horizontal component of the velocity is question 8 options: constant increasing decreasing negative question 9 (1 point) in the simulation above, as the projectile travels upward, how does the vertical velocity change? question 9 options: vertical velocity decreases. vertical velocity increases. vertical velocity remains the same. 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 decreases. vertical velocity is zero. vertical velocity remains the same. vertical velocity increases.

1. Trajectory

The path a projectile is called a trajectory in physics. It has a vertical component and even makes a parabola, but if we are talking about physics, it is trajectory.

2. A person sitting in a chair

Projectiles can be defined as an object that is in flight. So it has to be in the air. Since a person sitting in a chair is not in flight, then it is NOT a projectile. (Unless you throw the person in the air while he is in the chair)

3. 490 meters

We have the formula and our given:

d = 1/2gt²

Just plug in the values to get your

d = 1/2(-9.8m/s²)(10s)²

d = (-4.9m/s²)(100s²)

d = -490m

So since height is a scalar value, just take out the negative sign.

4. 65 m/s

Again we have our formula and given:

So we just plug in our values:

5. True

A projectile, if you will notice its trajectory moves both horizontally and vertically. The horizontal motion is what we call the x-component and the vertical is called the y-component. This is what gives it its' curved path.

6. False

An ellipse is an oval-shaped path. A projectile does not move in a circular/oval path. It travels a curved path. It can be parabolic. It is curved but it does not follow a circular path.

7. The vertical component always equals the horizontal component

This is false. Vertical component is different from the horizontal component. The horizontal component is not influenced by gravity only the vertical component. So in short, the horizontal component is the same throughout, but the vertical component changes over time.

8. Constant

Like mentioned above, the horizontal movement is constant or it does not change. This is because a projectile is defined also as an object that is influenced solely by gravity.

9. Vertical velocity decreases

This is because the movement is against the pull of gravity. It will continue to decrease until it will eventually come to a stop and start to descend. As it descends it increases.

10. Vertical velocity increases

I guess explained it above. As the object descends, the vertical movement increases. This is why you can actually die at certain heights. It increases as the time in flight increases. So the longer in flight, the faster it will get.

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000