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
olchik [2.2K]
3 years ago
9

What is the car's average velocity (in m/s) in the interval between t = 0.5 s to t = 2 s?

Physics
1 answer:
irakobra [83]3 years ago
4 0

Answer:

1.0\; \rm m \cdot s^{-1}.

Explanation:

Consider a time period of duration \Delta t. Let change in the position of an object during that period of time be denoted as \Delta x. The average velocity of that object during that period would be:

\displaystyle \bar{v} = \frac{\Delta x}{\Delta t}.

For the toy car in this question, the time interval has a duration of 2.0 \; \rm s - 0.5\; \rm s = 1.5\; \rm s. That is: \Delta t = 1.5\; \rm s. (One decimal place, two significant figures.)

On the other hand, what would be the change in the position of this toy car during that 1.5\; \rm s?

Note, that from readings on the snapshot in the diagram:

  • The position of the toy car was 0.1\; \rm m at t = 0.5\; \rm s (the beginning of this 1.5-second time period.)
  • The position of the toy car was 1.6\; \rm m at t = 2.0\; \rm s (the end of this 1.5-second time period.)

Therefore, the change to the position of this toy car over that time period would be \Delta x = 1.6\; \rm m - 0.1\; \rm m = 1.5\; \rm m. (One decimal place, two significant figures.)

The average velocity of this car over this period of time would thus be:

\displaystyle \bar{v} = \frac{\Delta x}{\Delta t} = \frac{1.5\; \rm m}{1.5\; \rm s} = 1.0\; \rm m \cdot s^{-1}. (Two significant figures.)

You might be interested in
Myopia is a condition of the eye where the crystalline lens focuses the light rays to a position between the lens and the retina
aliya0001 [1]

Answer: concave lens

Explanation:

Myopia is a condition of the eye where someone can only see near distant object clearly but not far distant object.

Myopia is corrected using concave lens (diverging) in order to diverge the rays entering the eye thereby allowing the rays to be focused properly on the retina.

4 0
3 years ago
Which of the following explanations is correct about the wave that travels through the medium?
SVETLANKA909090 [29]
The correct answer is letter A
5 0
2 years ago
If a circuit has a power of 50 W with a current of 4.5 A, what is the resistance in the circuit?
lawyer [7]

Answer:

{ \rm{power, \: p = current \times p.d}} \\ { \rm{50 = 4.5 \times (current \times resistance)}} \\ { \rm{50 = 4.5 \times (4.5 \times r)}} \\ { \rm{resistance =  \frac{50}{ {4.5}^{2} } }} \\  \\ { \rm{resistance = 2.5 \:  ohms}}

8 0
1 year ago
A 1.0-cm-tall object is 13 cm in front of a converging lens that has a 40 cm focal length.
kicyunya [14]

A) Image position: -19.3 cm

B) Image height: 1.5 cm, upright

Explanation:

A)

In order to calculate the image position, we can use the lens equation:

\frac{1}{p}+\frac{1}{q}=\frac{1}{f}

where

p is the distance of the object from the lens

q is the distance of the image from the lens

f is the focal length

In this problem, we have:

p = 13 cm (object distance)

f = 40 cm (focal length, positive for a converging lens)

So the image distance is

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{40}-\frac{1}{13}=-0.0519\\q=\frac{1}{-0.0519}=-19.3 cm

The negative sign means that the image is virtual.

B)

In order to calculate the image height, we use the magnification equation:

\frac{y'}{y}=-\frac{q}{p}

where

y' is the image height

y is the object height

In this problem, we have:

y = 1.0 cm (object height)

p = 13 cm

q = -19.3 cm

Therefore, the image heigth is

y'=-\frac{qy}{p}=-\frac{(-19.3)(1.0)}{13}=1.5 cm

And the positive sign means the image is upright.

6 0
3 years ago
I live for love, but i cant have it
luda_lava [24]

Answer:

Dont worry ,

One day you will find the love of your life

Explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Screws and wedges are modified blank
    15·1 answer
  • A student throws a rock upwards. The rock reaches a maximum height 2.4 seconds after it was released. How fast was the rock thro
    13·1 answer
  • A Ping-Pong ball has a mass of 2.3 g and a terminal speed of 9.2 m/s. The drag force is of the form bv2 What is the value of b?
    8·1 answer
  • Two climbers are on a mountain. Simon, of mass m, is sitting on a snow covered slope that makes an angle θ with the horizontal.
    11·1 answer
  • You are carrying a 7.0-kg bag of groceries as you walk at constant velocity along the sidewalk. You walk a distance of 82 meters
    5·1 answer
  • Coherent light with wavelength 598 nm passes through two very narrow slits, and the interference pattern is observed on a screen
    5·1 answer
  • john and kate live in the regions marked on the map. john experiences severe winters, with snowstorms and blizzards. in contrast
    11·1 answer
  • The number of windings on the primary coil of a transformer
    8·1 answer
  • A wheelchair moves upward on a 7.1 degree ramp at a speed of 20km/h what is the horizontal velocity
    9·1 answer
  • A different group is worried that the motion detector will not
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!