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
ICE Princess25 [194]
3 years ago
6

Two ice skaters, paula and ricardo, push off from each other. ricardo weighs more than paula. part a which skater, if either, ha

s the greater momentum after the push-off? which skater, if either, has the greater momentum after the push-off? paula has the greater momentum. ricardo has the greater momentum. both skaters have momentums of equal magnitude. submitmy answersgive up part b which skater, if either, has the greater speed after the push-off? which skater, if either, has the greater speed after the push-off? paula has the greater speed. ricardo has the greater speed. both skaters have equal speeds.
Physics
1 answer:
ahrayia [7]3 years ago
7 0

Apply the law of conservation of momentum for this situation. The law states that the momentum of a system is constant (in absence of external forces acting on it).

The 'system' in this case are the two skaters. There is no external force on the skaters. Suppose the skaters are initially standing still. The momentum in the system is 0. This value will need to remain constant, even after the mutual push (which is a set of forces from <em>inside</em> the system). So we know that

(total momentum before) = (total momentum after)

Indexing the masses and velocities by the first letter of the skaters' names:

0 = m_P\vec v_P+m_R\vec v_R\\m_P\vec v_P = m_R(-\vec v_R)

From the last row, you can see that the skaters will have momentum of same magnitude but opposite direction, after the push off. That answers the first question: neither will have a greater momentum (both will have one of same magnitude).

Since Ricardo is heavier, from the above equality it follows that

m_R>m_P\implies|\vec v_R|

In words, Paula has the greater speed, after the push-off.

You might be interested in
Which of these is equivalent to the law of conservation of energy?
Korolek [52]
The Law of the Conservation of Energy is stating that the total mechanical energy is always conserved or in simpler terms, not used or saved.
7 0
3 years ago
Read 2 more answers
Given a force of 100 N and acceleration of 5 m/s2, what is the mass
tatyana61 [14]

Answer:

20 kg

Explanation:

remember the equation f=ma.

100 N=force

5 m/s2= acceleration

so you need to divide force by acceleration: 100 N/ 5 m/s2= 20 kg, to get the mass.

8 0
2 years ago
The momentum of an object is proportional to its weight and speed.<br> a. true<br> b. false
Crank
It would be A.. True
4 0
3 years ago
What does convection mean
Sladkaya [172]
Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat
4 0
3 years ago
What is the difference between collinear and coplanar
DIA [1.3K]

Answer:

Collinear is when points are in the same straight line but coplanar is when points are all on the same plane.

4 0
3 years ago
Other questions:
  • A 270,000 kg rocket in gravity -free space expels 270 kg of fuel by exerting a force of 360 N on it. Find the magnitude of the a
    5·1 answer
  • HELP, what are 2 chemical properties of Tungsten.
    15·2 answers
  • What is the main purpose of trying to quickly cool heated food?
    6·2 answers
  • When astronauts travel to the moon, their bodies experience a lower gravitational pull than on Earth. Which type of pull are the
    5·2 answers
  • True or false <br> A ball thrown horizontally.Gravity causes the ball to continue horizontally.
    14·2 answers
  • An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s ). If a particular disk is spun at 235
    9·1 answer
  • The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have? 6 7 13 19
    6·1 answer
  • a car going 22 m/s accelerates to pass a truck. Five seconds later the car is going 35 m/s. Calculate the acceleration of the ca
    15·1 answer
  • An object of mass 100kg is moving with a velocity of 5m/s. Calculate the kinetic energy of that object
    13·2 answers
  • at what position an object be placed in front of a concave mirror of radius of curvature 40cm so that an erect image of magnific
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!