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
Elza [17]
3 years ago
12

a car travels from station A to B at 30kmph during its return trip A it travels 30 km pH for the first half distance and it 70 k

mph for half next half distance find the average speed of the car​
Physics
1 answer:
8_murik_8 [283]3 years ago
3 0

Explanation:

If you cannot visualize it, just assume that the distance from station A to B is 420km. Each half is 210km.

When the car travels from A to B, it takes 420/30 = 14 hours.

When the car travels from B to the halfway point, it takes 210/30 = 7 hours.

When the car travels from the halfway point to A, it takes 210/70 = 3 hours.

Total time taken = 14 + 7 + 3 = 24 hours.

Total distance = 420km * 2 = 840km.

Hence, the average speed of the car is 840/24 = 35km/h.

You might be interested in
A tennis player swings her 1000 g racket with a speed of 10 m/s. She hits a 60 g tennis ball that was approaching her at a speed
Mashutka [201]

(a)

consider the motion of the tennis ball. lets assume the velocity of the tennis ball going towards the racket as positive and velocity of tennis ball going away from the racket as negative.

m = mass of the tennis ball = 60 g = 0.060 kg

v₀ = initial velocity of the tennis ball before being hit by racket = 20 m/s

v = final velocity of the tennis ball after being hit by racket = - 39 m/s

ΔP = change in momentum of the ball

change in momentum of the ball is given as

ΔP = m (v - v₀)

inserting the above values

ΔP = (0.060) (- 39 - 20)

ΔP = - 3.54 kgm/s

hence , magnitude of change in momentum : 3.54 kgm/s

7 0
3 years ago
Which describes the changes in visible light moving from red to violet?
eimsori [14]
The wavelength decreases to roughly half.
(The frequency roughly doubles.)
3 0
4 years ago
you just saw a magazine ad that shows several people having fun at a football game. They are all wearing a specific shoe brand.
Scilla [17]
The answer for the question is bandwagon. Hope it helped :)

6 0
3 years ago
What happens when a mechanical wave travels through a medium? Question 1 options: a) Waves are transferred. b) Mass is transferr
ladessa [460]
D. Energy is transferred
3 0
4 years ago
A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the hori
AVprozaik [17]

A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. the vertical velocity of this motion is mathematically given as

V' = 25 m/s. Option C.

<h3>What is the vertical velocity of this motion?</h3>

Generally, the equation for the Inclined Component is mathematically given as

V=d/s

Therefore

V = 500/10

V= 50 m/s

In conclusion, for the vertical Component

V'= dsin \theta

V'= 50Sin30

V' = 25 m/s

Read more about Motion

brainly.com/question/605631

#SPJ1

4 0
2 years ago
Other questions:
  • What is the process whereby salt is removed from salt water​
    11·1 answer
  • How much energy is needed to generate 0.71 x 10-16 kg of mass?
    10·1 answer
  • How much heat energy (in megajoules) is needed to convert 7 kilograms of ice at –9°C to water at 0°C?
    9·2 answers
  • Two airplanes leave an airport at the same time. The velocity of the first airplane is 750 m/h at a heading of 51.3°. The veloci
    14·2 answers
  • Which force in nature is believed to have formed second?
    10·1 answer
  • What determines velocity rather than speed??
    13·1 answer
  • How will minerals orient when a rock is put under normal stress?
    9·1 answer
  • A lamina occupies the part of the disk x2 + y2 ≤ 49 in the first quadrant. Find the center of mass of the lamina if the density
    5·1 answer
  • How does the change in the temperature of the universe provide evidence for universe expansion that supports the Big Bang Theory
    7·1 answer
  • Magnesium hydroxide is a common ___?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!