In a 4*100m relay race,tota track length is 200m and time taken by one particular group is 50.2sec. ehat is the average speed and average velocity of that group?plzzzz help mee
Answers
A " 4 x 100 m " race means that four runners each run 100 meters, for
a total of 400 meters ... very close to a quarter mile.
On a 200-meter track, each runner does halfway around the track, and
the whole team of four runners does twice around the track.
This team did the whole thing in 50.2 seconds. The average time for each runner
was 50.2/4 = 12.55 seconds.
Velocity is a speed and a direction. We have the speed, leaving only the puzzle of
what to do about the 'average' direction.
Here's a sneaky but easy way to dispense with the whole issue:
Define the average velocity (vector) as (total displacement vector)/(total time).
Since the fourth runner finished in exactly the same spot as the first runner
began, the total displacement is zero, and therefore so is the average velocity.
Related Questions
Solar energy advantages and disadvantages
Europa, a satellite of Jupiter, is believed to have an ocean of liquid water (with the possibility of life) beneath its icy surface. Europa is 3130 km in diameter and has a mass of 4.78×10²² kg. In the future, we will surely want to send astronauts to investigate Europa.In planning such a future mission, what is the fastest that such an astronaut could walk on the surface of Europa if her legs are 0.960 m long?
Surgeons, engineers, carpenters, plumbers, electricians, and furniture movers all rely on trained experience with visual thinking. Describe how one of these tradespeople or someone in another occupation uses visual thinking in his or her work.
An electric kettle. The input energy is 10 Joules. The useful output energy is heat 9Joules. Wasted energy is sound 1 Joules.
Answers
The angular velocity of the earth is
The satellite tangential velocity is the distance from the earth times the angular velocity, which is
For meters per second, we divide by the number of seconds in an hour, which is 3600:
Final answer:
The tangential velocity of a satellite, with the same angular velocity as the Earth and 5x10^7 m distance from Earth's center, is calculated to be approximately 3650 m/s.
Explanation:
The tangential velocity of a satellite is given by the formula v = rω, where 'v' is the tangential velocity, 'r' is the radius (distance from the center of the Earth to the satellite), and 'ω' is the angular velocity. The referenced satellite's angular velocity is the same as that of the Earth, which is approximately 7.292 x 10^-5 rad/s. Given r = 5x10^7 m (the satellite's distance from Earth), we input these values into the formula:
v = (5x10^7 m)(7.292 x 10^-5 rad/s)
Upon calculation, we find that the satellite's tangential velocity is approximately 3650 m/s.
Learn more about Tangential Velocity here:
#SPJ6
B) Ocean tides bring warm water to the surface.
C) Warm water contains more salt than cold water.
D) Ocean water loses heat to the air at the surface.
Answers
Answer:
The answer is A because the less dense the water is the more closer to the surface it will be and when heated by the sun, it increases the temperature of surface currents.
Explanation:
I took the test, hope this helped!
It is greatest at 25% of the period length.
B.
It is greatest at the point where the arm meets the pivot point.
C.
It is greatest when the bob is at its maximum amplitude.
D.
It is greatest when the bob is in the rest position.
Answers
Answers
Answer and Explanation:
- When light goes from an optically rarer medium to an optically more dense medium, the bending of light takes place towards the normal.
- In case, the light travels from air, i.e., less dense to water, i.e., optically more dense, then in accordance to Snell's law, the medium with the lower refractive index will have the larger angle whereas the medium with higher refractive index will have smaller angle.
- Also, as light travels from a an optically less dense to optically more dense medium, speed of light reduces and hence its wavelength while the frequency remains intact.
- Converse is true when light travels from an optically more denser to optically less dense medium, the light bends away from the normal, like in case of water to air, where water is comparatively more dense
Answers
Answer:
The electromagnetic wave that travels the fastest through space is gamma ray
Explanation:
Electromagnetic wave is a type of wave which does not require material medium for its propagation. Examples of electromagnetic waves according to increasing frequency of the waves are gamma ray, x-ray, ultra violet ray, infra red, visible light, micro wave and radio waves.
Frequency of a wave is inversely proportional to period of oscillation of the wave. The higher the frequency of a wave, the shorter the period of oscillation. Gamma ray has the highest wave frequency in electromagnetic spectrum and shorter period of oscillation, thereby causing it to have the highest penetration power.
Answers
Answer:
ok
Explanation:
what is the length of the court. you need the length to answer the question