Fill in the blanks: 1. When a spring is pulled, the is proportional to the ( called law.
2.Weight is the force of on an object due to the pull of the
3. Weights and other forces are measured in
4. Here on Earth, the pull of gravity on a mass of 1 kg is Newtons
5. Weight is measured by a balance and from place to place
6. Newton's first law says: every mass stays at or moves at constant in a line unless a resultant acts on it
7. To move in a orbit, an object must have a force on it

i would say the answer is food.

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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.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.