# I need someone to explain a physics question for me

Anonymous
account_balance_wallet \$5

### Question Description

nick1982
School: University of Virginia

a. The type of collisition is plastic . When  two objects collide into one after impact we call the collition plastic . If they do not form one object we call the collition elastic .

b. To do that calculation we need the initial momentum of the system .

we consider the right side as possitive for velocity and we get

m1 * u1 + m2 * u2 =  5*2.5 + 8 * (-2.5) = 12.5 - 20 = -7.5  kg * m / s

Due to the fact that there are only preservative powers in the system the momentum will be preserved meaning the momentum of the system after the plastic collition will be the same thus 7.5

the two cart system will have the equal mass of the the two initial carts meaning m1 + m2 = m = 5 + 8 = 13 kg

the momentum of the two cart system will be m * v where v is the velocity of the combined carts

as we stated above the two momentums -before collition - and after will be the same thus

m*v = 7.5 => 13*v = -7.5 => v = 0.576 m /s will be the velocity of the combined carts . The negative sign means that the velocity is opposite the to right side we took as possitive meaning the object moves to the left

flag Report DMCA
Review

Anonymous
Goes above and beyond expectations !

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors