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
sveta [45]
3 years ago
9

An object is falling under the influence of gravity in presence of air resistance . There are two forces acting on it. (i) What

are these two forces? (ii)Explain why will the object start moving with uniform velocity after some time?
Physics
1 answer:
MatroZZZ [7]3 years ago
8 0

Answer:

1 the forces are:friction, gravitational pull

2.i guess due to uniform change in displacement per unit time therefore uniform acceleration

You might be interested in
How to solve these two questions? ​
hammer [34]

1) See attached figure

The relationship between charge and current is:

i = \frac{Q}{t}

where

i is the current

Q is the charge

t is the time

Therefore, the current is the rate of change of the charge passing through a given point over time.

This means that for a graph of charge over time, the current is just equal to the slope of the graph.

For the graph in this problem:

- Between t = 0 and t = 2 s, the slope is

\frac{50-0}{2-0}=25 C/s

therefore the current is

i = 25 A

- Between t = 2 s and t = 6 s, the slope is

\frac{-50-(50)}{6-2}=-25 C/s

therefore the current is

i = -25 A

- Between t = 6 s and t = 8 s, the slope is

\frac{0-(-50)}{8-6}=25 C/s

therefore the current is

i = 25 A

The figure attached show these values plotted on a graph.

2) 15 \mu C

The previous equation can be rewritten as

Q = i t

This equation is valid if the current is constant: if the current is not constant, then the total charge is simply equal to the area under a current vs time graph.

Here we have the current vs time graph, so we gave to find the area under it.

The area of the first triangle is:

A_1 = \frac{1}{2}(0.001 s)(0.010 A)=5\cdot 10^{-6} C

While the area of the second square is

A_2 = (0.002 s - 0.001 s)(0.010 A)=1\cdot 10^{-5}C

So, the total area (and the total charge) is

Q=A_1 +A_2 = 5\cdot 10^{-6} + 1\cdot 10^{-5} = 1.5\cdot 10^{-5}C=1.5 \mu C

3 0
3 years ago
Which of the following best illustrates chemical potential energy a dog Plane, gasoline gasoline, water moving down hill, a skyd
ladessa [460]
The skydiver has a bunch of gravitational potential energy. The best example of chemical potential energy is gasoline.
3 0
3 years ago
Consider a turnbuckle that has been tightened until the tension in wire AD is 350 N. Draw the FBD that is required to determine
Mars2501 [29]

Answer:

yes

Explanation:

yes

6 0
3 years ago
What are the basic si units for the speed of light?.
DanielleElmas [232]
C=meters/second or C=m/s
7 0
2 years ago
Differentiate between rest and motion.
Lyrx [107]

Answer:

<em>1</em><em>. </em><em>A body is said to be at rest if its position does not change with respect to its surroundings.</em>

8 0
3 years ago
Other questions:
  • What would happen if Pinocchio were to say "My nose will grow now."
    6·2 answers
  • Helpppppp pleaseeeeee
    9·1 answer
  • What angle is needed between the direction of polarized light and the axis of a polarizing filter to cut its intensity in half?
    11·1 answer
  • I NEED HELP PLEASE, THANKS! :)
    13·2 answers
  • A stream of air flowing at 20 liters/min with P = 0.20 MPa and T = 400 K is mixed with a stream ofmethane flowing at 5 liters/mi
    12·1 answer
  • Christopher came down with chicken pox after spending time in his child's day care. The chicken pox represents what link in the
    14·1 answer
  • The temperature rises from 25.00°C to 29.00°C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calori
    11·1 answer
  • If the astronaut in the video wanted to move upward, in which direction should he throw the object? Why?
    7·2 answers
  • Pls answer ASAP pls and thnk you my friends
    7·1 answer
  • Who is corazon aquino? ​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!