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
Usimov [2.4K]
3 years ago
6

A 12.0 g bullet was fired horizontally into a 1 kg block of wood. The bullet initially had a speed of 250 m/s. The block of wood

was hanging from a 2 m long piece of (massless) string. After the collision the block/bullet combined object swings upward on the string. Find the height the block/bullet combined object rises.
Physics
2 answers:
LuckyWell [14K]3 years ago
7 0

Answer:

The rise in height of combined block/bullet from its original position is 0.45m

Explanation:

Given;

mass of bullet, m₁ = 12 g = 0.012 kg

mass of block of wood, m₂ = 1 kg

initial speed of bullet, u₁ = 250 m/s.

initial speed of block of wood, u₂ = 0

From the principle of conservation of linear momentum, calculate the final speed of the combined block/bullet system.

m₁u₁ + m₂u₂ = v(m₁+m₂)

where;

v is the final speed of the combined block/bullet system.

0.012 x 250 + 0 = v (0.012 + 1)

3 = v (1.012)

v = 3/1.012

v = 2.96 m/s

From the principle of conservation of energy, calculate the rise in height of the block/bullet combined from its original position.

¹/₂mv² = mgh

¹/₂v² = gh

¹/₂ (2.96)² = (9.8)h

4.3808 = 9.8h

h = 4.3808/9.8

h = 0.45 m

Therefore, the rise in height of combined block/bullet from its original position is 0.45m

topjm [15]3 years ago
5 0

Answer:

0.45 m

Explanation:

From the law of conservation of momentum,

mv = (m + M)V where m = mass of bullet = 12 g = 0.012 kg, v = initial speed of bullet = 250 m/s, M = mass of block = 1 kg, V = final velocity of bullet and block.

V = mv/(m + M) = 0.012 kg 250 m/s/(0.012 + 1) kg = 3/1.012 = 2.96 m/s

From the law of conservation of energy,

ΔU + ΔK = 0 where U = potential energy of mass and block and K = kinetic energy of mass and block

ΔU = -ΔK

(m + M)gh - 0 = -[0 - 1/2(m + M)V²]

(m + M)gh - 0 = -[0 - 1/2(m + M)V²]

(m + M)gh = 1/2(m + M)V²

gh = 1/2V²

h = V²/2g where h is the height moved by the combined bullet and block

h = (2.96 m/s)²/(2 × 9.8 m/s²)

h = 0.45 m

You might be interested in
Please need help on this one
jolli1 [7]

Answer:

The second answer from the top, no the energy in the wave pushed the water particles from above the earthquake in the opposite direction.

Explanation:

I believe this is the correct answer. Hope you do well

4 0
3 years ago
Read 2 more answers
How is biomass energy better than geothermal energy
aleksklad [387]
If you search that click the first link ;)
5 0
3 years ago
Explain biome in your own words.
EleoNora [17]

Hello,


A biome is a big habitat consisting of biotic and abiotic factors. there are 7 main biomes they are tundra.

taiga.

temperate deciduous forest.

scrub forest

grassland.

desert.

tropical rain forest.

temperate rain forest.

Hope this helps

Plz mark me as brainliest

3 0
3 years ago
3. One atom of silicon can properly be combined in a compound with A. One atom of chlorine. B. Three atoms of hydrogen. C. Two a
Paraphin [41]

C :<em>2 atoms of Oxygen can probably join 1 Silicon Atom</em>

4 0
3 years ago
where F is the magnitude of the gravitational attraction on either body, m1 and m2 are the masses of the bodies, r is the distan
zavuch27 [327]

                              Force  =  G  ·  m₁  ·  m₂   /   r²

In all SI units . . .

                        [ newton ]  =  [ G ] · [kg] · [kg] / [meter²]

But 'newton' is  kg-m / s²
So the formula says

                                  [ kg-m / s² ]  =  [ G ] · [kg] · [kg] / [meter²]

Divide each side
by  kg² :                    kg-m / s²-kg²  =  [ G ]  /  meter²

Multiply each side
by  meter² :              kg-m-m² / s²-kg²  =  G

Cancel 'kg' from
top and bottom:            m-m² / s²-kg  =  G

Clean it up:                 <span>   [ G ]  =  m³ / kg - s²      <==

Check:
Look up "Gravitational constant" on-line:
</span>Gravitational constant =  6.67408 × 10-11 m³ kg⁻¹ s⁻²   <==          yay !<span />
                        
8 0
3 years ago
Other questions:
  • PLEASE ANSWER FAST!!
    5·2 answers
  • A stationary shell is exploded in to three fragments A, B, C of masses in the ratio 1:2:3. A travels
    5·1 answer
  • Plss help me asap
    13·1 answer
  • The temperature at which the vapor pressure of a liquid equals the environmental pressure surrounding the liquid is best defined
    8·2 answers
  • Molecules can be made of atoms of
    8·2 answers
  • Resistance in wires causes which of the following to occur?
    10·2 answers
  • If you found a galaxy with an Ha emission line that had a wavelength of 756.3 nm, what would be the galaxy’s distance if the Hub
    15·1 answer
  • A snail crawls 300 cm in 1 hour. Calculate the snail's speed in each of the following units. a. centimeters per hour (cm/h) b. c
    10·1 answer
  • What happens to the particles in a substance when temperature rises
    6·1 answer
  • How do you find component velocities of parallel vectors?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!