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2 years ago

For these pictures is more or less friction needed?

Physics

1 answer:

antiseptic1488 [7]2 years ago

4 0

Answer:

8: More

9: More

10: More

11: Less

12: Less

12: More

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If the range of a projectile's trajectory is ten times larger than the height of the trajectory, then what was the angle of laun

Lunna [17]

Answer:

Angle of projection from the horizontal will be $21.80^{\circ}$

Explanation:

We have given that range of the projectile is 10 times the height of the projectile

Let the projectile is projected with velocity u at an angle $\Theta$

Range of the projectile is equal to $R=\frac{u^2sin2\Theta }{g}$

And height of the projectile is equal to $h=\frac{u^2sin^2\Theta }{2g}$

Now according to question range is 10 times of height

So $\frac{u^2sin2\Theta }{g}=10\times \frac{u^2sin^2\Theta }{2g}$

$sin2\Theta =5sin^2\Theta$

$2sin\Theta cos\Theta =5sin^2\Theta$

$tan\Theta =\frac{2}{5}=0.4$

$\Theta =tan^{-1}0.4=21.80^{\circ}$

So angle of projection from the horizontal will be $21.80^{\circ}$

3 0

2 years ago

A bowling ball and a bag of potato chips are dropped at the same time from a tall tower on the moon. there is no air on the moon

rusak2 [61]

Both objects will hit the ground at the same time

8 0

3 years ago

Read 2 more answers

Is solar system a natural system or human-made system

eimsori [14]

Answer:

Natural

Explanation:

6 0

2 years ago

Read 2 more answers

Researchers in the Antarctic measure the temperature to be -32°F. What is this temperature on the following scales?(a) the Celsi

Illusion [34]

Answer:

a) -35.6°C

b) 237.4 K

Explanation:

To convert temperature from degree celsius to degree fahrenheit, use the formula below:

$T_c=\frac{5}{9}(T_f-32)$

a) Therefore to convert -32°F to celsius, substitute it into the celsius

$\begin{gathered} T_c=\frac{5}{9}(-32-32) \\ \\ T_c=\frac{5}{9}(-64) \\ \\ T_c=-35.6^0C \end{gathered}$

b) To covert to the Kelvin scale, use the formula below

$\begin{gathered} T_k=T_c+273 \\ \\ T_k=-35.6+273 \\ \\ T_k=237.4K \\ \end{gathered}$

8 0

8 months ago

PLEASE HELP!!!!!!! MY HOMEWORK IS DUE TODAY !!!!!!!!

bogdanovich [222]

Answer:

Distance = 25000000 miles

Time = 50 hours

Explanation:

Venus is the closest planet to Earth. It is about 25 million miles away from Earth. Its precise distance depends on where both Venus and Earth are in their respective orbits

Given that

Speed V = 500000 mph

Distance d = 25 000,000 miles

Speed = distance/ time

Time = distance/speed

Time = 25000000/500000

Time = 50 hours

It will therefore take 50 hours to get to venus at that speed.

5 0

2 years ago