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
Thepotemich [5.8K]
3 years ago
12

A bullet moving at a speed of 152 m/s passes through a plank of wood at 128m/s. Another bullet moving at 97m/s passes through th

e same plank at what speed?
Physics
1 answer:
Ivahew [28]3 years ago
4 0

Answer:

The speed of the plank is 81.68 m/s

Explanation:

Given that,

Speed of bullet = 152 m/s

Speed of wood = 128 m/s

Speed of another bullet = 97 m/s

We need to calculate the speed of plank

Using conservation of momentum

m_{1}u_{1}=(m_{1}+m_{2})v

Where,

u = initial velocity

v = final velocity

152m_{1}=(m_{1}+m_{2})128....(I)

m_{1}97=(m_{1}+m_{2})v....(II)

From equation(I) and equation(II)

\dfrac{152}{97}=\dfrac{128}{v}

= \dfrac{128\times97}{152}

v=81.68\ m/s

Hence, The speed of the plank is 81.68 m/s

You might be interested in
A crate is acted upon by a net force of 100N. An acceleration of 5.0 m/s^2 results. What is the rate of the crate?
andreev551 [17]
Is there any other information given? I don't think you can solve this without a time
6 0
3 years ago
Ex 1) A Major League baseball pitcher throws a baseball straight up into the air and the ball travels for 4
nlexa [21]

Answer:

52 / 4 = 13 m/s

Explanation:

7 0
2 years ago
A seagull flies at a velocity of 9.00 m/s straight into the wind. (a) if it takes the bird 20.0 min to travel 6.00 km relative t
enot [183]

Here we will the speed of seagull which is v = 9 m/s

this is the speed of seagull when there is no effect of wind on it

now in part a)

if effect of wind is in opposite direction then it travels 6 km in 20 min

so the average speed is given by the ratio of total distance and total time

v_{avg} = \frac{6000}{20*60}

v_{avg} = 5m/s

now since effect of wind is in opposite direction then we can say

V_{net} = v_{bird} - v_{wind}

5 = 9 - v_{wind}

v_{wind}= 4 m/s

Part b)

now if bird travels in the same direction of wind then we will have

v_{net}= v_{bird} + v_{wind}

v_{net} = 9 + 4 = 13 m/s

now we can find the time to go back

time = \frac{distance}{speed}

time = \frac{6000}{13}

time = 7.7 minutes

Part c)

Total time of round trip when wind is present

T = t_1 + t_2

T = 20 + 7.7 = 27.7 min

now when there is no wind total time is given by

T = \frac{6000}{9} + \frac{6000}{9}

T = 22.22 min

So due to wind time will be more

4 0
3 years ago
If oxygen and steel wool are combined is it a physical change or chemical change?
Anon25 [30]

Answer:

I think it would be a chemical change.

Explanation:

Because a physical would be like crushing it or something along that line.

4 0
3 years ago
Read 2 more answers
Consider electrons of kinetic energy 6.0 eV and 600 keV. For each electron, find the de Broglie wavelength, particle speed, phas
irinina [24]

Answer:

For 6.0 eV

0.5 nm, 1.45*10^6 m/s, 6.17*10^10 m/s, 1.45*10^6 m/s

For 600 eV

1.26*10^-3 nm, 2.66*10^8 m/s, 3.37*10^8 m/s, 2.66*10^8 m/s

Explanation:

See attachment for calculation

5 0
3 years ago
Other questions:
  • A fox sees a piece of carrion men thrown from a Hawk's Nest and rushes to snatch it. The best is 14.0m high and the carrion is t
    15·1 answer
  • A force of 6.0 N pulls a box 0.40 m along a frictionless plane that is inclined at 36°. What work is being done by the pulling f
    5·1 answer
  • What other structures is it near hypothalamus?
    10·1 answer
  • Of the seven chambers in the masque of the red death, which room is the least popular, and why?
    8·1 answer
  • A resistor is connected across an oscillating emf. The peak current through the resistor is 2.0 A. What is the peak current if:
    5·1 answer
  • Which of the following is true regarding mixtures? a. One substance not combined with any other substances. b. Two or more subst
    15·1 answer
  • Erosion and Weathering can cause changes in earths surface but how does erosion alone changes the earth surface.
    5·1 answer
  • A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of t
    5·1 answer
  • The break light on a car is connected to a 12V battery. If the resulting current is 0.4A what is the resistance of the brake lig
    14·1 answer
  • Which statement is correct about the equation for work?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!