-Only do 15 to 21 show work The green ball continues moving after the collision

Question

-Only do 15 to 21 show work

The green ball continues moving after the collision at 2.8 m/n in the same direction. Answer in units of m/s The green ball continues moving after the collision at 0.9 m/s in the same direction. Answer in units of m/s A billiard ball of mass 0.514 kg and speed 0.422 m/s make a head-on elastic collision with an identical billiard ball at rest. What is the kinetic energy of the second ball after the collision? Answer in units of J What the magnitude of its linear momentum? Answer in units of kg m/s A cue ball initially moving at 3.8 m/s strike a stationary right ball of the same size And mass. After the collision, the cue ball's final speed is 1.1 m/s. Find the right hall's angle with respect to the original line of motion of the cur hall. Assume an elastic collision (ignoring friction and rotational motion). Answer in units of degree A mass springs with force constant 455 N/m is fastened at its left end to a vertical wall, as shown below. The acceleration of gravity is 9.8 m/s2. Initially, the 9 kg block and 4 kg block rest on a horizontal surface with the 9 kg block in font art with the spring (bait not comprising it) and with the 4 kg block in contact with the 9 kg block. The 9 kg block is then moved to the left, comprising the spring a distance of 0.5 m. and held in place while the 4 kg block remains at rest as; shown below. Determine the elastic energy U stored in the comprised spring. Answer in units of J The 9 kg block is then released and accelerates to the right, toward the 4 kg block. The surface it rough and the coefficient of friction between each block and the surface is 0.5. The two blocks collide, stick together, and move to the right. Remember that the spring is not attached to the 9 kg block. Find the speed of the 9 kg block just before it collide with the 4 kg block. Answer in units of m/s Find the final speed of both blocks (stuck together) just after they collide. Answer in units of m/s Find the horizontal distance the blocks move before coming to rest. Answer in units of m

Explanation / Answer

15 )

in elastic collsion and same mass then both will exchange their velocities

then

second body

0.422 m/

tthen required answer - KE = 0.5*0.514*0.422*0.422 = 0.0457 J

16) linear momentum = 0.514* 0.422 = 0.2169

17)consertvatoin of momentum in vertical and horizontal direction

1.1*sintheta = Vsin phi

1.1 cos theta + V cos phi = 3.8

18) energy srored = 0.5*455* 0.5*0.5 = 56.875 J

19) 56.875 = 0.5*9*9.8*0.5 + 0.5*9*u*u

u = 2.78 m/s

20)

conservation of momentum in that instant

9*2.78 + 0 = (9+4)*V

V = 1.92 m/s

21) 0.5*13*1.92*1.92 = 0.5*13*9.8*s

s= 0.376 m

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