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Savatey [412]
3 years ago
14

A 15-g bullet moving at 300 m/s passes through a 2.0 cm thick sheet of foam plastic and emerges with a speed of 90 m/s. Let's as

sume that the speed of the bullet changes takes place uniformly (uniform deceleration). Find the change in momentum of the bullet. Find the time the bullet is in contact with the plastic, Delta t. Find the average force impeded by the bullet's motion through the plastic.
Physics
1 answer:
Shkiper50 [21]3 years ago
8 0

Answer:

Explanation:

a) Change in momentum, Δp = mΔv = m(v - u) = (15 * 10-3) * (90 - 300) = -3.15 kg-m2

b) Acceleration of the bullet, a = (v2 - u2) / 2s = (902 - 3002) / (2 * 0.02) = -2047500 m/s2

So, the bullet is in contact with the plastic for the time,  \bigtriangleupt = \frac{(v - u)}{a} =\frac{(90 - 300)}{(-2047500)} = 1.03 \times 10^{-4} s

c) Average force, F_{avg} =\frac{\bigtriangleup p}{\bigtriangleup t} =\frac{(-3.15)}{(1.03 \times 10^{-4})} = 30.6 kN

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Answer:

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Explanation:

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3 years ago
On Ella's fifth birthday, her parents told her she had to stop whining or no one would want to play with her. She tried very har
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3 years ago
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In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 3.42 x 104-m length of wire
makvit [3.9K]

Answer:

15116.4 V

Explanation:

B = Earth's magnetic field at the location = 6.5\times 10^{-5}\ T

L = Length of the wire = 3.42\times 10^4\ m

v = Velocity of the shuttle = 6.8\times 10^8\ m/s

The emf generated is given by

E=BLv\\\Rightarrow E=6.5\times 10^{-5}\times 3.42\times 10^{4}\times 6.8\times 10^3\\\Rightarrow E=15116.4\ V

The motional emf generated between the ends of the wire is 15116.4 V

8 0
3 years ago
If the mass of the object is 6 kg and the velocity is 4 m/s what is the kinetic energy of the object ?
Lelu [443]

Answer:

<h2>48 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the mass

v is the velocity

From the question we have

k =  \frac{1}{2}   \times 6 \times  {4}^{2}  \\  = 3  \times 16

We have the final answer as

<h3>48 J</h3>

Hope this helps you

6 0
3 years ago
The time in hours it takes a satellite to complete an orbit around the earth varies directly as the radius of the orbit (from th
nikitadnepr [17]

Answer:It takes a satellite 12.93 hours to complete an orbit around the earth if it is at 1500miles above the earth at a velocity of 38,00mph

Explanation:

Taking 3960miles to be the radius of the earth, we use simple proportions to solve

(1500+3960)/(660+3960) × (32000/38000)× 13 = T in hours to complete orbit.

T=(5460/4620) × (32/38) ×13

T= 12.93hours

4 0
3 years ago
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