6. what would be the mass of a rock falling from the sky if it hits the ground with a force of 147 n? (hint:
think about the acceleration all falling objects have! )

ill do it for 100, also this isnt 80 its 40

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.