The spring in a scale in the produce department of a supermarket stretches 0.025 meter when a watermelon weighing 1.0 x 10 newtons
is placed on the scale. What is the spring constant?

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

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.