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
barxatty [35]
3 years ago
8

Use the motion map to answer the question.

Physics
1 answer:
Lana71 [14]3 years ago
3 0

Answer:

The object starts away from the origin and then moves toward the origin at a constant velocity. Next, it stops for one second. Finally, it moves away from the origin at a greater constant velocity.

You might be interested in
There are no current plans for returning to the moon. <br> True<br> False
inysia [295]
True that’s my answer
8 0
3 years ago
Read 2 more answers
The legislative branch has the power to (3 points)
maw [93]
Hi there!

The Legislative Branch of government includes the House of Representatives and the Senate. This branch makes laws. Its powers include passing laws, originating spending bills (House), impeaching government officials (Senate), and approving treaties (Senate).

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
3 0
3 years ago
Read 2 more answers
What is the difference between transverse and longitudinal waves? Transverse waves always have greater frequencies than do longi
Anastasy [175]

Answer:

A

Explanation:

6 0
3 years ago
Observe some of the phenomena around your home. Look for something that you can’t explain right away, but that you could test wi
Leno4ka [110]

a toy/model steam engine. how it works and how to measure horse power

3 0
3 years ago
A few years ago, Serena Williams dived to hit a tennis ball right after it bounced off the ground. The ball bounced on the groun
pshichka [43]

Answer:

The initial velocity of the ball was 20 m/s

Explanation:

Please, see the figure for a description of the problem.

The initial velocity vector can be written as follows:

v0 = (v0x, v0y)

where:

v0 = initial velocity

v0x = horizontal component of the initial velocity

v0y = vertical component of the initial velocity

The position and velocity of the ball at time "t" are described by the vector "r" and "v" respectively:

r = (x0 + v0x * t, y0 + v0y * t + 1/2 * g * t²)

v = (v0x, v0y + g*t)

Where:

r = position vector of the ball

x0 = initial horizontal position

t = time

y0 = initial vertical position

g = acceleration due to gravity

v = velocity vector

Considering the center of our system of reference as the point at which the ball left Serena´s racket, x0 and y0 = 0.

We know that at a time t = 1.21 s the y-component of the position vector must be 0 (see "r final" in the figure). Then:

y0 + v0y * t + 1/2 * g * t² = 0          y0= 0

v0y * 1.21 s + 1/2 * (-9.8 m/s²) * (1.21 s)² = 0

v0y = -(1/2 * (-9.8 m/s²) * (1.21 s)²) / 1.21 s

v0y = 1/2 * 9.8 m/s² * 1.21 s

v0y = 5.93 m/s

If we see in the figure the trajectory of the ball if there had been no gravity ("s"), we will notice that it is a stright line with a slope of:

Δy/Δx = (0.95m(y) + 2.63m(y)) / 11.7 m(x) = 0.31 m(y) / m(x)

This slope means that the ball will go up 0.31 m for every meter it goes right.

Then, if initially the ball goes up 5.93 m every second, it will go right

(5.93 m(y) * (1 m(x) / 0.31 m(y)) = 19.1 m(x). Then, v0x = 19.1 m/s

The vector initial velocity will be:

v0 = (19.1 m/s, 5.93 m/s)

magnitude of v0 =|v0| = \sqrt{(19.1m/s)^{2}+(5.93m/s)^{2}}= 20.0 m/s

Another way to solve this is by using the equation for velocity:

We know that when the ball passes over the net, the vertical velocity is 0. Then, we can calculate the time at which the ball passes over the net and use that time to obtain v0x from the equation for position, since we know that at that time the x-component of the position is 11.7 m.

When the ball is over the net:

v0y + g*t = 0

t = -v0y/g = -5.93 m/s/-9.8 m/s² = 0.61 s.

Notice that, since the trajectory is a parabola, knowing the final time we could easily calculate the time at which the ball passes the net by dividing that final time by 2: 1.21 s / 2 = 0.61 s

Then, using this time in the equation for position:

v0x * t = 11.7 m

v0x = 11.7 m / 0.61 s = 19.2 m/s which is aproximately the same as the obtained above.

7 0
2 years ago
Other questions:
  • If it takes 320 N of force to push a box up a ramp, yet it would take 1,600 N of force to lift the box straight up, what is the
    9·1 answer
  • An ideal photo-diode of unit quantum efficiency, at room temperature, is illuminated with 8 mW of radiation at 0.65 µm wavelengt
    11·1 answer
  • From the illustration of the potassium atom, fill in the periodic table selection.
    14·1 answer
  • A stack of bricks weighs 170 KN (Kilo-newtons). The stack exerts 180 KPa (Kilo-pascals) of pressure on the ground. What is the a
    15·1 answer
  • Does a swimmer underwater observe the same color or a different color for this light?
    15·1 answer
  • Suppose the Earth's magnetic field at the equator has magnitude 0.50×10−4T and a northerly direction at all points. Part A Estim
    12·1 answer
  • To understand the electric potential and electric field of a point charge in three dimensions Consider a positive point charge q
    6·1 answer
  • Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form in a straight line
    6·1 answer
  • How is it possible for the same object to have different amounts of gravitational potential energy?
    10·1 answer
  • Which type of wave can only be transmitted through matter?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!