Two 2.0 kg bodies, a and b, collide. the velocities before the collision are
v→a=(15i^+30j^) m/s
and
v→b=(−10i^+5.0j^) m/s
. after the collision,
v→a=(−5.0i^+20j^) m/s
. what are (a) the final velocity of b and (b) the change in the total kinetic energy (including sign)?

Explanation:

Given

mass of body A

mass of body

Velocity before Collision is

after collision

let and velocity of B after collision in x and y direction

conserving momentum in x direction

as thus

Conserving momentum in Y direction

thus velocity of B after collision is

(b)Change in total Kinetic Energy

Initial Kinetic Energy of A  And B

Total initial Kinetic Energy =1250 J

Final Kinetic Energy of A  And B

Final Kinetic Energy

Change

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.