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
Airida [17]
3 years ago
14

El trabajo hecho por la gravedad durante el descenso de un proyectil es:

Physics
1 answer:
Ket [755]3 years ago
5 0

Answer:

<h2>a) positivo.</h2>

Explanation:

The question is

The work done by gravity during a projectile decline is:

a) Positive.

b) Negative.

c) Zero.

d) Depends on y-axis direction.

e) Depends on x-axis direciton.

Remember that Work is defined as the energy needed to move an object. Mathematically, it's the product between the force exerted and the displacement. That means if we don't have any displacement, then there's no work.

In this case, we are talking about the work done by the gravity force. When a projectile goes down, it's because of the gravity force, which means it can't be zero.

Specifically, the work done by gravity is positive, because when the projectile is going down, it's getting closer to the atracttive mass, which is Earth.

Therefore, the right answer is a.

You might be interested in
A 1.40 mH inductor and a 1.00 µF capacitor are connected in series. The current in the circuit is described by I = 14.0 t, where
4vir4ik [10]

Answer:

Explanation:

Inductance L = 1.4 x 10⁻³ H

Capacitance C = 1 x 10⁻⁶ F

a )

current I = 14 .0 t

dI / dt  = 14

voltage across inductor

= L dI / dt

= 1.4 x 10⁻³ x 14

= 19.6 x 10⁻³ V

= 19.6 mV

It does not depend upon time because it is constant at 19.6 mV.

b )

Voltage across capacitor

V = ∫ dq / C

= 1 / C ∫ I dt  

= 1 / C ∫ 14 t dt

1 / C x 14 t² / 2

= 7 t² / C

= 7 t² / 1 x 10⁻⁶

c ) Let after time t energy stored in capacitor becomes equal the energy stored in capacitance

energy stored in inductor

= 1/2 L I²

energy stored in capacitor

= 1/2 CV²

After time t

1/2 L I² = 1/2 CV²

L I² =  CV²

L x ( 14 t )² = C x  ( 7 t² / C )²

L x 196 t² = 49 t⁴ / C

t² = CL x 196 / 49

t = 74.8 μ s

After 74.8 μ s energy stored in capacitor exceeds that of inductor.

7 0
3 years ago
Spherical mirror is a​
madam [21]

Answer:

Spherical mirror is a mirror with a curved reflecting surface.

5 0
2 years ago
Which of the following is NOT a way that machines provide a mechanical advantage?
Nonamiya [84]
The following choice that is NOT a way that machines provides a mechanical advantage is to change direction. The correct answer is A. 
4 0
3 years ago
Read 2 more answers
The rate at which an object moves is the object's __________.
11111nata11111 [884]

Answer:

speed

Explanation:

4 0
3 years ago
Read 2 more answers
Plz help w answer 1:/ confused ash
Galina-37 [17]

Answer:

I would say d I had the same question yesterday and I got it correct so hope that helps

5 0
2 years ago
Read 2 more answers
Other questions:
  • Atoms that are large and unstable are likely to undergo
    14·1 answer
  • Calculated the gravitational potential energy of a 93.0 kg sky diver who is 550 m above the ground
    5·1 answer
  • What influence do culture and customs have on beliefs about mental disorders? Customs really don't determine what is considered
    11·1 answer
  • A student wishes to investigate how the material of which an object is made affects how the object changes temperature. The stud
    12·1 answer
  • Whenever a musician plays a guitar, they pluck one of the guitar strings to produce a standing wave in the string. Then pinch do
    7·1 answer
  • A balloon behaves so that the pressure isP=C2V1/3 and C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of
    14·1 answer
  • What is photosynthesis ​
    15·2 answers
  • The starting position is 0m. The starting velocity is 30m/s. Time is given as 2.5s. What is the final position of the object?
    7·1 answer
  • Please Explain it to me I really need help with this if you can I will mark u brainliest​
    10·1 answer
  • consider the hypothetical observation irregular galaxies outside the local group are moving toward us. from part a, this observa
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!