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
astraxan [27]
3 years ago
11

Conservation of Momentum Practice

Physics
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

Before: 0 m/s  

After: -4 m/s

Explanation:

Before: Since you and your beau started at rest, your beau initial velocity is 0 m/s.

After: Since we have to conserve momentum,

momentum before push = momentum after push.

The momentum before push = 0 (since you and your beau are at rest)

momentum after push = m₁v₁ + m₂v₂ were m₁ = your mass = 60 kg, v₁ = your velocity after push = 3 m/s, m₂ = beau's mass = 45 kg and v₂ = beau's velocity.

So, m₁v₁ + m₂v₂ = 0

m₁v₁ = -m₂v₂

v₂ = -m₁v₁/m₂ = -60 kg × 3 m/s ÷ 45 kg = -4 m/s

So beau moves with a velocity of 4 m/s in the opposite direction

You might be interested in
In an electrical circuit, "_____" refers to the rate at which electrical energy is transformed into another kind of energy.
Tems11 [23]

Answer:

<em>Electrical power</em>

Explanation:

<em>Electrical power:</em> Electric power (P) is defined as the energy (W) used or produced or transformed per seconds.

Power = Energy produced/transformed/time taken.

P = W/t................................ Equation 1

Where t = time taken

But,

W = VIt................................ Equation 2

Substituting equation 2 into equation 1

P = VIt/t

P = VI............................ Equation 3

or

P = V²/R or P = I²R.

The unit of power is J/s or Volt-ampere is called watt (W).

Large amount of electric power are required in the industry

1 kW = 1000 W

1 MW = 1000000 W

1 h.p = 3/4 kW.

8 0
3 years ago
A 20 kg box rests on the ground. Round all answers to the hundredths, if necessary. What is the weight of the box?​
cricket20 [7]
  • Mass=m=20kg
  • Acceleration due to gravity=10m/s^2

Weight=Applied force

\\ \sf\longmapsto F=mg

\\ \sf\longmapsto F=20(10)

\\ \sf\longmapsto F=200N

5 0
3 years ago
Read 2 more answers
How does Newton's second law of motion can be used to calculate the acceleration of an object?
Alex777 [14]

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

4 0
4 years ago
ASAP answer all pls will mark brainiest
sammy [17]

Answer:

1) B

2)D

Explanation:

I am unsure of #2

7 0
3 years ago
Read 2 more answers
The velocity selector in in a mass spectrometer consists of a uniform magnetic field oriented at 90 degrees to a uniform electri
NeTakaya

Answer:

50k/h is the answer to iy

3 0
3 years ago
Other questions:
  • If you're swimming underwater and knock two rocks together, you will hear a very loud noise. But if your friend above the water
    7·1 answer
  • A uniform, 0.0300-kg rod of length 0.400 m rotates in a horizontal plane about a fixed axis through its center and perpendicular
    15·1 answer
  • A circular loop of flexible iron wire has an initial circumference of 170 cm , but its circumference is decreasing at a constant
    8·2 answers
  • At noon on a clear day in​ midsummer, a cylindrical titanium plate is placed in the sun. The plate is painted flat black so that
    14·1 answer
  • An object is placed to the left of a convex mirror, such that the object-to-image distance is 140 cm.
    15·1 answer
  • Are basins a collection of smaller watersheds
    15·1 answer
  • When air pressure decreases, the mercury in a barometer _____.
    11·1 answer
  • Is it possible for speed to be constant when acceleration is not zero?
    8·1 answer
  • Calculate the rotational kinetic energy in a motorcycle wheel of mass 12.0 kg with an outer radius of 0.330 m and inner radius o
    7·1 answer
  • an object is being pulled along the ground by a force of 75N directed 28° above horizontal how much work does the force do in pu
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!