Tuesday, 19 August 2014


Select the correct term to complete the sentences.
Newton’s third law
law of conservation of energy
law of conservation of momentum
inelastic collision
elastic collision
kinetic energy
potential energy

1. The ____ states that the total amount of momentum in a closed
system cannot change.
2. ____ is calculated by multiplying a force and the time needed for the
force to act.
3. According to ____, for every action force, there is a reaction force
equal in strength and opposite in direction
 4. The mass of an object multiplied by its velocity equals its ____.
5. The ____ states that energy can never be created or destroyed, just
changed from one form to another.
6. The unit of energy needed to push with a force of one newton over a
distance of one meter is one ____.
7. Energy due to position is known as ____.
8. Energy of motion is called ____.
9. ____ is needed to cause change to an object, such as changing its
speed or height.
10. ____ is force times distance moved in the direction of the force.
11. When two or more objects hit each other, a ____ occurs.
12. When two objects collide and stick together or change shape, it is
called a(n) ____.
13. Two billiard balls bouncing off each other is an example of a(n) ____.