Science

These are some questions, and the answers are from a book on science. Here they are:

1. Define mechanics: The study of motion 
2. State Newton's first law of motion: If an object is moving, it will keep moving. If an object is still, it will remain still. 
3. What is another name for Newton's first law?: The law of inertia.
4. Define mass and acceleration: Mass is how much substance an object has, and acceleration is any change in the motion of an object. 
5. State Newton's second law of motion: The acceleration of an object is directly proportional to the force applied to the object and inversely proportional to the  mass of the object. 
6. What is another name for Newton's second law of motion?: The law of acceleration.
7. Explain directly proportional and inversely proportional: If two measurements are directly proportional, than when one increases the other increases too. If two measurements are  inversely proportional, then when one increases the other decreases.  
8. Write the law if acceleration in simple equation form: acceleration = force/mass
9. Write Newton's second law of motion as force = ?: Force = mass x acceleration.
10. State Newton's third law of motion: For every action, there is a equal reaction.