1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna [14]
3 years ago
6

The trajectory of a projectile always ________________. The trajectory of a projectile always ________________. is a straight li

ne, in the same direction as the initial velocity vector follows a circular path curves downward, below the initial velocity vector at first goes up above the initial velocity vector and then curves down
Physics
2 answers:
tiny-mole [99]3 years ago
8 0

Answer:

<h2>Curves downward. </h2><h2>At first goes up above the initial velocity and then curves down. </h2>

Explanation:

The trajectoy of a projectile is always a parabola concave down, beacuse it's movement is modeled by

y=v_{0} t-\frac{1}{2}gt^{2} (vertical motiion)

So, we know that quadratic equations are represented by parabolas.

So, the first answer is curves downward.

A simpler reason why it curves down is gravity, this acceleration makes the object to change is direction and velocity.

An important fact is that the inital and final point are at the same level, which means the initial velocity vector and the final velocity vector are equal.

However, notice that a projectile trajectory first moves up the initial vector and then moves down.

So, the second answer is at first goes up above the initial velocity and then curves down. However, it's important to notice that we are referring to the trajectory here, because higher positions of the projectile means a least velocity vector, because gravity is reducing the velocity.

jenyasd209 [6]3 years ago
6 0

Answer:

curves downward, below the initial velocity vector.

Explanation:

Projectile launches are generally divided into two types: the oblique throw and the free fall. The free fall of bodies consists of throwing or abandoning projectiles from a hill or any unevenness that has a height in relation to a frame (usually the ground), while the oblique launch consists of launching a projectile at an angle. any relative to a frame (usually the ground).

Regardless of the type, when reading the paragraph above, we can say that the trajectory of a projectile will always be curved down and below the initial velocity vector.

You might be interested in
Compare and contrast electrical and magnetic forces
erik [133]

Answer:

the eletrical forces are created when an object is both moving charges and stationary charges.

the magnetic forces are created when an act on only moving charges.

3 0
3 years ago
A ____ is the time required for one half of the nuclei in a radio- ____ isotope to decay.
sukhopar [10]

Answer:

A half-life is the time required for one half of the nuclei in a radio- active isotope to decay.

Explanation:

A radio-active isotope is an isotope which undergoes radioactive decay.

Radioactive decay is a spontaneous process in which the nucleus of an atom changes its state (turning into a different nucleus, or de-exciting), emitting radiation, which can be of three different types: alpha, beta or gamma.

The half-life of a radio-active isotope is the time required for half of the nuclei of the initial sample to decay.

The law of radio-active decay can be expressed as follows:

N(t) = N_0 (\frac{1}{2})^{t/t_{1/2}}

where

N(t) is the number of undecayed nuclei left at time t

N0 is the initial number of nuclei

t is the time

t_{1/2} is the half-life

We see that when t=t_{1/2} (that means, when 1 half-life has passed), the number of undecayed nuclei left is

N(t) = N_0 (\frac{1}{2})^{t_{1/2}/t_{1/2}}=N_0 (\frac{1}{2})^1=\frac{N_0}{2}

So, half of the initial nuclei.

5 0
3 years ago
What are two ways in which friction can be useful?
pishuonlain [190]
If something is going down a hill it can help slow it down

it can stop you from flying off a rollercoaster
6 0
3 years ago
Read 2 more answers
The sun warms equatorial regions of Earth ______ than the poles. This cause an area of ________ pressure to develop near the equ
Lera25 [3.4K]

Answer:

more

low

toward

Explanation:

6 0
3 years ago
if a sample that is 4860 years old has 50 radium atoms remaining, how many atoms were in the original sample?
snow_lady [41]
243000, take the 4,860 and times it by 50
4 0
3 years ago
Other questions:
  • What brings greater concentration of dissolved nutrients to ocean surface
    6·2 answers
  • Obesity refers to gradual weight gain as a person grows older
    8·1 answer
  • What is the evaluation?
    11·1 answer
  • a horizontal force of 100N is required to push a crate across a factory floor at a constant speed. What is the net force acting
    8·1 answer
  • What moon phase occurs 3-4 days after a waning gibbous?
    11·1 answer
  • Find the mass of a sample that has a dersity of 2 g/mL and a volume of 10 mL
    14·1 answer
  • An electric pole shown in the figure below supports a power line that passes through it. A cable tied to the pole at B passes th
    7·1 answer
  • Which of the following statements about trash in the United States is FALSE?
    14·2 answers
  • Help on 9 and 10!!!!!! I’ll give 5 starts
    7·1 answer
  • Which of Newton’s laws best describes why the penny hung in the air for a split second?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!