Aspaceship of mass 1.9×106 kg is cruising at a speed of 5.1×106 m/s when the antimatter reactor fails, blowing the ship into three pieces. one section, having a mass of 4.8×105 kg , is blown straight backward with a speed of 2.5×106 m/s . a second piece, with mass 8.1×105 kg , continues forward at 1.2×106 m/s . what is the speed of the third piece? assume that the initial speed of the ship is positive. part awhat is the speed of the third piece? express your answer using two significant figures. m/spart bwhat is the directionof the third piece? straight backwardstraight forward

16.26*10⁶ m/s straight forward

Explanation:

mass of third piece = (1.9*10⁶-4.8*10⁵-8.1*10⁵) = 6.1*10⁵ kg

According to the laws of conservation of linear momentum,

the momentum of the moving objects before impact is equal to the momentum of the objects after impact (Assuming no external forces were applied)

momentum before impact = momentum after impact

(as in the graph)

Assume the spaceship was moving forward horizontally right.

After the blast then the pieces also should have horizontal velocities only.

We assume the third part travels forward→

                                    MV  =  m1*v1 + m2*v2 + m3*v3

→1.9*10⁶ * 5.1*10⁶ = ←4.8*10⁵  * 2.5*10⁶ + →8.1*10⁵ * 1.2*10⁶ +→ 6.1*10⁵ * V

V=16.26*10⁶ m/s straight forward

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force