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
KatRina [158]
3 years ago
7

A bullet of mass 50 g travelling with a speed of 15ms penetrates into a

Physics
1 answer:
densk [106]3 years ago
4 0

Answer:

a) The bullet will penetrate 0.375 meters into the bag of sand.

b) The average force exerted by the sand is 15 newtons.

Explanation:

The statement is incorrectly written. The correct form is presented below:

<em>A bullet of mass 50 grams travelling with a speed of 15 meters per second penetrates into a bag of sand and is uniformly brought to rest in 0.05 second.</em>

<em>a)</em><em> How far the bullet will penetrate into the bag of sand?</em>

<em>b)</em><em> The average force exerted by the sand?</em>

b) The average force exerted by the sand on the bullet (F), measured in newtons, is determined by Principle of Linear Momentum Conservation and Impulse Theorem:

F = \frac{m\cdot (v_{f}-v_{o})}{\Delta t} (1)

Where:

m - Mass of the bullet, measured in kilograms.

v_{o}, v_{f} - Initial and final speeds of the bullet, measured in meter per second.

\Delta t - Impact time, measured in seconds.

If we know that m = 0.05\,kg, v_{o} = 15\,\frac{m}{s}, v_{f} = 0\,\frac{m}{s} and \Delta t = 0.05\,s, then the average force exerted by the sand is:

F = \frac{(0.05\,kg)\cdot \left(0\,\frac{m}{s}-15\,\frac{m}{s}  \right)}{0.05\,s}

F = -15\,N

The average force exerted by the sand is 15 newtons.

a) The distance travelled by the bullet (\Delta s), measured in meters, is determined by application of Principle of Energy Conservation and Work-Energy Theorem:

\Delta s = \frac{m\cdot (v_{f}^{2}-v_{o}^{2})}{2\cdot F } (2)

If we know that m = 0.05\,kg, v_{o} = 15\,\frac{m}{s}, v_{f} = 0\,\frac{m}{s} and F = -15\,N, then the distance travelled by the bullet is:

\Delta s = \frac{(0.05\,kg)\cdot \left[\left(0\,\frac{m}{s} \right)^{2}-\left(15\,\frac{m}{s} \right)^{2}\right]}{2\cdot (-15\,N)}

\Delta s = 0.375\,m

The bullet will penetrate 0.375 meters into the bag of sand.

You might be interested in
A branch falls from a tree How fast is the branch moving after 0 28 seconds
egoroff_w [7]

Answer:

c. 2.7 m/s

Explanation:

v = a.t + v_{0}\\a = g = 9.81 m/s^{2}} \\t=0.28 s \\v_{0} = 0\\=> v = 9.81 * 0.28 = 2.74 m/s

3 0
3 years ago
Please help me it's URGENT (#10 btw and also how do I solve for time​
Afina-wow [57]

Answer:

t = 12s

Explanation:

Given:

v-initial = 0 m/s

x = 360 m

a = 5.0 m/s^2

Solve:

x = (v-initial)t + 1/2(a*t^2)

360 = 0t + 1/2 (5.0t^2)

360 = 2.5 t^2

144 = t^2

t = sqrt(144) = 12

Therefore, it takes 12 seconds.

5 0
3 years ago
Responsible for reflex, maintain muscles tone and dopamine. 8 letter word
Lady bird [3.3K]
Exercise is the answer hope i helped you 
3 0
3 years ago
Two forces are acting on a wheelbarrow. One force is pushing to the right and an equal force is pushing to the left. What can yo
andreev551 [17]

-- As far as we know, the forces on the wheelbarrow are balanced.

-- That tells us that the net force on the wheelbarrow is zero, just
as if there were no forces acting on it at all.

-- That tells us that the wheelbarrow's acceleration is zero ... its
speed and direction of motion are not changing.

-- That tells us that the wheelbarrow is moving in a straight line
at a constant speed.  It's very possible that relative to us, the speed
may be zero, but we can't tell that from the given information.

6 0
3 years ago
What is unique regarding the abdominal muscle when is compared to other muscle in the body?
marissa [1.9K]
Answer:a is the answer
8 0
2 years ago
Other questions:
  • 1. Ca atomic number 2. H2O fission 3. nuclear decay element 4. nuclear synthesis fusion 5. η compound 6. positive charge electro
    5·2 answers
  • A box fails to slide down a ramp at a warehouse. what happens if you put the box on a cart that has wheels?
    8·2 answers
  • Instruments in an airplane which is in level flight indicate that the velocity relative to the air (airspeed) is 180.00 km/h and
    8·1 answer
  • Bob walks 290 m south, then jogs 630 m southwest, then walks 290 m in a direction 26 ∘ east of north.
    12·1 answer
  • Two identical gliders on an air track are held together by a piece of string, compressing a spring between the gliders. While th
    11·1 answer
  • A skateboarder travels on a horizontal surface with an initial velocity of 3.6 m/s toward the south and a constant acceleration
    5·1 answer
  • An 8 kg toddler is running at a speed of 10 m/s.<br> how much energy does he have?
    14·1 answer
  • A force of 10 N making an angle 30 with horizontal .its horizontal component wll be​
    10·1 answer
  • if a car engine has a thermal efficiency of 40% and it does 400 j of work in one cycle, how much energy input does it require ea
    11·1 answer
  • could you help with question 5. Your solutions to the word problems in volving Newton's Laws should have the following features:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!