A2100 kg truck is traveling east through an intersection at 2.0m/s when it is hit simultaneously from the side and the rear. (some people have all the luck! ) one car is a 1200 kg compact traveling north at 5.0m/s. the other is a 1500 kg midsize traveling east at 10m/s. the three vehicles become entangled and slide as one body.
a. what is their speed just after the collision?
b. what is their direction just after the collision?

a) Vf = 4.19m/s

b) α = 17.35° due north of east

Explanation:

By conservation of the linear momentum:

On the x-axis:

mt*Vt+m2*V2 = (mt + m1 + m2 )* Vfx

Vfx = 4 m/s

On the y-axis:

m1*V1 = (mt + m1 + m2) * Vfy

Vfy = 1.25 m/s

The speed is therefore:

Vf = 4.19m/s

The angle of their velocity:

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.