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
lara31 [8.8K]
2 years ago
9

Aight here's the question:

Physics
1 answer:
Anarel [89]2 years ago
5 0

Answer:

5.12\:\text{m/s}

Explanation:

From the conservation of momentum, the total momentum of the system before and after the collision must be the same. Therefore, let the momentum of Homeboy Joe be p_b and let the mass of Homegirl Jill be p_j. We can write the following equation:

p_{bi}+p_{ji}=p_{bf}+p_{jf}, where subscripts i and f represent initial and final momentum respectively.

The momentum of an object is given by p=mv.

Therefore, we have:

m_{b}v_{bi}+m_{j}v_{ji}=m_{b}v_{bf}+m_{b}v_{jf} (some messy subscripts but refer to the values being plugged in you're confused what corresponds with what).

Plugging in values, we have:

99.5\cdot 6.65 + 68.8\cdot (-1.10)=99.5\cdot 2.35+ 68.8\cdot v_{jf}.

Solving, we get:

v_{jf}=\frac{99.5\cdot 6.65+68.8\cdot (-1.10)-99.5\cdot2.35}{68.8},\\v_{jf}=5.11875,\\v_{jf}\approx \boxed{5.12\:\text{m/s}}.

It's important to note that velocity is vector quantity, so the negative velocity assigned to Jill simply implies she is moving at 1.10\:\text{m/s} in the opposite of Joe's direction. After the collision, she is now moving 5.12\:\text{m/s} in the same direction that Joe was initially moving, due to Joe's relatively large mass and initial velocity.

You might be interested in
A woman takes her dog Rover for a walk on a leash. She pulls on the leash with a force of 30.0 N at an angle of 29° above the ho
ValentinkaMS [17]

Answer:

The force parallel to the horizontal is 26.24 N

Explanation:

She pulls on the leash with a force F = 30 N, this force, since its at an angle of 29° (i will cal this angle \theta), it has a force component on x (the horizontal, i will call this force F_{x}) and a force component on y (the vertical, i will call this F_{y} ).

This can be seen in the attached picture.

Since we are asked about the force parallel to the horizontal, we need to find the component of the force F_{x}, since F_{x} is the adjacent angle, we need to use cosine:

F_{x}=Fcos \theta

since F=30N and \theta=29

F_{x}=(30N)cos(29)

F_{x}=(30N)(0.8746)

F_{x}=26.24N

The force parallel to the horizontal is 26.24 N

7 0
3 years ago
A graduated beaker with 375 mL of water is sitting on a scale which measures the weight of the glass and water to be 7.60 N. Whe
Allisa [31]

Answer:

Volume of water displaced = 450 - 375 = 75 ml

Vr = volume of rock = 75 ml

Wr = 9.22 - 7.60 = 1.62 N  weight of 75 ml of rock

Density of rock = 1.62 N / 75 ml = .0216 N / ml

Density of water = 1000 g / 1000 ml = 9.8 N / 1000 ml = .0098 N / ml

Density of rock / density of water = .0216 / .0098 = 2.20

8 0
2 years ago
Three 1.5V cells are connected in series in a circuit. What is the total potential difference?
lorasvet [3.4K]

Answer:

4.5V

Explanation:

1.5x3= 4.5

4 0
2 years ago
Hello people ~
lozanna [386]

Answer:

It’s called a conservative field.

Explanation:

I think it’s going to be the conservative field because in the question it talks about how it is able to become possible to define potential at a point in an electric field because electric field.

3 0
2 years ago
Read 2 more answers
Select True or False for the following statements about conductors in electrostatic equilibrium. All points of a conductor are a
erik [133]

Answers :

1. All points of a conductor are at the same potential. - True

2. Charges prefer to be uniformly distributed throughout the volume of a conductor. - False

3 The electric field inside the conducting material is always zero. -True

4.Just outside the surface of a conductor, the electric field is always zero. - False

4 0
3 years ago
Other questions:
  • An engine that has an efficiency of 25% takes in 200 [J] of heat during each cycle. Calculate the amount of work this engine per
    5·1 answer
  • Which is the correct symbol for an isotope of bromine with 35 protons and 38 neutrons?
    13·2 answers
  • What are the three key points to seismic waves​
    11·1 answer
  • The potential difference between the plates of a parallel plate capacitor is 4.00 V. If the plate separation for this capacitor
    12·1 answer
  • Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.360 mm wide. The diffraction pattern is observed
    5·1 answer
  • You are attending a county fair with your friend from your physics class. While walking around the fairgrounds, you discover a n
    12·1 answer
  • A force is a push or pull.<br> O<br> A. True<br> O<br> B. False
    14·2 answers
  • Please help i give brainest but i need help asap
    11·1 answer
  • Define the following:
    13·1 answer
  • Determine the momentum of a system of the two objects. One object, m1, has a mass of 3.5 kg and a velocity of 20 m/s towards the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!