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3 years ago

A plane is traveling North at 80km/hr into a 20 km/hr headwind (South). What is the plane's resultant velocity?

Physics

2 answers:

frosja888 [35]3 years ago

8 0

Answer:

60km/hr

Explanation:

R=80 - 20

=60km/hr, north

Alexxandr [17]3 years ago

5 0

Answer:

Consider our plane flying at a speed of 80 km/hr into a 40 km/hr crosswind. Its speed, relative to the ground, can be calculated by adding the two vectors as shown on the right. What happens to the speed of the plane as the crosswind increases in magnitude? Look at the animation on the right. It is obvious that the speed of the plane, relative to the ground, increases in magnitude.

Explanation:

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drek231 [11]

For harmer:-

initial velocity=u=0m/s

Acceleration due to gravity=10m/s^2

Now

$\\ \sf\longmapsto s=ut+\dfrac{1}{2}gt^2$

$\\ \sf\longmapsto s=0t+\dfrac{1}{2}(10)t^2$

$\\ \sf\longmapsto s=5t^2\dots(1)$

For soft drink:-

u=24m/s

$\\ \sf\longmapsto 30-s=(24)t+\dfrac{1}{2}(10)t^2$

Using eq(1)

$\\ \sf\longmapsto 30-5t^2=24t-5t^2$

$\\ \sf\longmapsto 24t=30$

$\\ \sf\longmapsto t=\dfrac{30}{24}$

$\\ \sf\longmapsto t=1.2s$

After 1.2s they will meet.

Now

putting t in eq(1)

$\\ \sf\longmapsto s=5t^2=5(1.2)^2=5(1.44)=7.2m$

At the height of 7.2m they will meet

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3 years ago

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Mars2501 [29]

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3 years ago

The triceps muscle in the back of the upper arm extends the forearm.

iren [92.7K]

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$\tau = F \times r$