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4 years ago

Two masses move at right angles to each other and collide 1 mass is stopped what is the velocity of the other

1 answer:

5 0

Let m1 and m2 be the two masses, whereby m1 is the one that stops upon collision (assuming an elastic collision). We use the conservation of the momentum for this situation, namely the total momentum of the two moving masses is conserved and equal the momentum of the mass2 after the collision:

$m_1\overline{v_1}+m_2\overline{v_2}= m_2\overline{v}$

From this we can determine the resulting velocity:

$\overline{v} = \frac{m_1}{m_2}\overline{v_1}+\overline{v_2}$

Which answers the question for general values of m1, m2, v1, and v2.

For instance, if m1=m2, and v1=v2=1 m/s then the resulting velocity of the mass2 would be sqrt(2) m/s in the direction of 45 degrees from its original path.

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Dr. John Paul Stapp was U.S. Air Force officer who studied the effects of extreme deceleration on the human body. On December 10

Mars2501 [29]

Answer:

a) $a=5.7551 \times g$

b) $d=20.5539\times g$

Explanation:

Given:

speed of rocket initially, $v_i=0\ m.s^{-1}$

top speed of rocket after acceleration, $v=282\ m.s^{-1}$

time taken to get to the top speed, $t_i=5\ m.s^{-1}$

final speed of the rocket, $v_f=0\ m.s^{-1}$

time taken to get to the final speed after reaching the top speed, $t_f=1.4\ s$

Now the acceleration:

$a=\frac{v-v_i}{t_i}$

$a=\frac{282-0}{5}$

$a=56.4\ m.s^{-2}$

Now as a fraction of gravity:

$a=\frac{56.4}{9.8}\times g$

$a=5.7551 \times g$

Now, the deceleration:

$d=\frac{0-282}{1.4}$

$d=201.4285\ m.s^{-2}$

Now as a fraction of gravity:

$d=\frac{201.4285}{9.8}\times g$

$d=20.5539\times g$

6 0

4 years ago

Which rock is made mostly of dark, fine-grained silicate minerals, chiefly plagioclase feldspar and pyroxene, and magnetite?

Dafna1 [17]

A dark-colored (igneous rock,) commonly extrusive from volcanic eruptions and composed primarily of the minerals of calcic plagioclase and pyroxene, and sometimes olivine. Basalt is the fine-grained equivalent of gabbro.

8 0

4 years ago

Can someone please help me answer 14 and 15??

ziro4ka [17]

14. The Aurora is an incredible light show caused by collisions between electrically charged particles released from the sun that enter the earth's atmosphere and collide with gases such as oxygen and nitrogen. The lights are seen around the magnetic poles of the northern and southern hemispheres.

15.
About 5.4 billion years from now, the sun will have exhausted all of its hydrogen. The sun's core will get really hot and dense, thus shrinking; however, the outer region of the sun will expand and grow. ... Even if the expanding dying sun doesn't reach Earth, the sun's high temperatures will completely burn the planet.

7 0

4 years ago

What is the mass of a soda can on a triple beam balance

Scrat [10]

It depends on the kind of soda can

6 0

3 years ago

For this quiz, we shall return to the radio control car track that we visited briefly on the last quiz. The track is 10 meters l

Iteru [2.4K]

Answer:

$v=1.54\,\,metres\,\,per\,\,second$

Explanation:

The given equation is $x=x_0+vt$ where $x_0$ denotes initial time in the stopwatch and $x$ denotes the distance covered by car.

As the judge starts her watch at the instant the car passes the 2.0 meter mark $(x_0=2)$ and the judge reads 3.9 seconds on her stopwatch when the car passes the 8.0 meter mark.

Put $x_0=2,\,,\,x=8\,,\,t=3.9$ in equation $x=x_0+vt$

$8=2+3.9t\\8-2=3.9t\\6=3.9v\\v=\frac{6}{3.9}\\ v=1.54\,\,metres\,\,per\,\,second$

3 0

3 years ago