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
kow [346]
3 years ago
8

two soccer players run toward each other. one player has a mass of 85 kg and runs west with a speed of 8 m/s, while the other ha

s a mass of 105 kg and runs east with a speed of 7 m/s. what is the total momentum of the system made up of the two players?
Physics
2 answers:
marissa [1.9K]3 years ago
8 0

Answer:

Total momentum, p = 55 kg-m/s

Explanation:

It is given that,

Mass of player 1, m₁ = 85 kg

Mass of player 2, m₂ = 105 kg

Speed of player 1, v₁ = -8 m/s (west)

Speed of player 2, v₂ = 7 m/s (east)

Momentum is equal to the product of mass and velocity. For this system, momentum is given by :

p=m_1v_1+m_2v_2

p=85\ kg\times (-8\ m/s)+105\ kg\times 7\ m/s

p = 55 kg-m/s

The total momentum of the system made up of the two players is 55 kg-m/s.

adelina 88 [10]3 years ago
6 0

Answer:

+55 kg m/s  

Explanation:

Momentum is the product mass and velocity.

P = m × v

Let the east be in positive direction and west be in negative.

mass of player 1, m = 85 kg

velocity of player 1, v = -8 m/s

mass of player 2, m' = 105 kg

velocity of player 2, v' = +7 m/s

In the absence of any external unbalanced force acting on the system, the total momentum remains conserved. So, the total momentum of this system made having two players is:

P = m v + m' v'

⇒P = (85)(-8) + (105)(7)

⇒P = -680 + 735 = +55 kg m/s

You might be interested in
A.complete the following sentences with your own result or condition
ludmilkaskok [199]

1. If I hadn't bought that car yesterday.

2. I would have never bought the tickets for today..

3. She wouldn't have gotten suspended.

4. We could've worked on our project.

5. but I was in the shower.

6 0
3 years ago
A ferry coming into port is sailing at 12 m/s. It takes 2.5km to come to rest in the port. Calculate the deceleration of the fer
pogonyaev

Answer:    -0.0288 m/s^2

Explanation:

Let's suppose that the ferry decelerates at a constant rate A (deceleration is an acceleration in the opposite direction to the original motion of an object)

Then the acceleration equation of the ferry will be:

a(t) = -A

(the negative sign is because this acceleration is in the opposite direction with respect to the movement of the ferry)

To get the velocity equation of the ferry, we need to integrate with respect to the time, t, we will get:

v(t) = -A*t + v0

where v0 is the initial velocity of the ferry, v0 = 12m/s.

v(t) = -A*t + 12m/s

For the position equation of the ferry we need to integrate again over time:

p(t) = (-A/2)*t^2 + (12m/s)*t + p0

Where p0 is the initial position of the ferry, in this case, it can be zero, because it will depend on where we put the origin on our coordinate axis.

then p0 = 0m

P(t) = (-A/2)*t^2 + (12m/s)*t

The ferry will come to rest at the moment when it's velocity is equal to zero, this will happen when:

v(t) = 0m/s = -A*t + 12m/s

We need to find the value of t.

A*t = 12m/s

t = (12m/s)/A

Now we can replace this in the position equation because we know that the ferry needs 2.5 km or 2500 meters to come to rest.

p(  (12m/s)/A) = 2500m =  (-A/2)*( (12m/s)/A)^2 + (12m/s)*((12m/s)/A)

2500m = (-72 m^2/s^2)/A + (144m^2/s^2)/A

2500m = (72 m^2/s^2)/A

2500m*A = (72 m^2/s^2)

A = (72 m^2/s^2)/2500m = 0.0288 m/s^2

and the acceleration of the ferry was -A, then the acceleration of the ferry is:

-0.0288 m/s^2

4 0
2 years ago
Describe a situation when you might travel at a high velocity, but with low acceleration
Alisiya [41]

Reading a book in your warm, comfy seat ... in Row-27 of a
passenger airliner cruising at 450 miles per hour.
 
5 0
3 years ago
What effect does gravity have on a person living on earth?
GREYUIT [131]
Pulling a person down so we stick to the surface
5 0
3 years ago
Distance between the two place is 35 kilometers . If two persons start running towards each other from these two place with a sp
pashok25 [27]

The first person = A

The second one = B

velocity of A = 3 km / h

velocity of B = 4 km / h

Distance of A = 3t

Distance of B = 35 - 4t

At what time do they meet?

3t = 35 - 4t

7t = 35

t = 5 hours

7 a.m. + 5 hours = 12 p.m.

7 0
3 years ago
Other questions:
  • Please Please Please Can Help Me On This Question!!!!! I Give Thanks!!!!
    5·1 answer
  • Does a brick have thermal energy? Also does paper haven't thermal energy?
    5·1 answer
  • A projectile is fired over level ground with an initial velocity that has a vertical component of 20 m/s and a horizontal compon
    13·1 answer
  • Jet aircraft maintenance crews are required to wear protective earplugs. Members of a particular crew wear earplugs that reduce
    13·1 answer
  • a motorcar is moving with a velocity of 108 km / h and it takes 4s to stop after the brakes are applied calculate the force exer
    5·2 answers
  • Why does a solid keep its shape
    5·1 answer
  • The distance around the block is equal to 3000 feet, how many blocks would you have to run to run a total of a mile?
    5·1 answer
  • Balanced forces acting on an object
    8·1 answer
  • Can you hellp me please
    13·2 answers
  • Stephen schwartz created the musical godspell as well as __________.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!