REMEMBER:
-  F = ma (Newton's second law)
- The principle of intertia (Newton's frst law)
- weight = mass x g , g is the acceleration due to gravity g = - 9.8m/s/s on Earth.
- The mass is the quantity of matter an object has ((no matter the planet you are on or the distance from the planet)
- the weight is the force of gravity (depends how massive is the planet and how far you are from the center of the planet)
- For every action, there is an equal but opposite reaction (Newton's third law)


1) Rewrite each sentence below to make it correct. 
A) Weight has no relation to mass _____________________________________________________________

B) An object at rest tends to accelerate ______________________________________________

C) As mass increases, intertia decreases ______________________________________________________________

D) An object in motion will accelerate of no outside forces are acting on it _________________________________________

E) Objects with greater mass fall more quckly due to graivty (in space, no air) ________________________________________________

F) In the case of an object at rest on the ground or on a table, gravity is not balanced by other forces _______________________________

G) If there were no friction, it would be easier to walk ________________________________________________

H) Forces require contact to act on an object ________________________________________

I) Given only an object's mass and tis acceleration, it is not possible to determine the amount of force that is acting on it _________________

2) REVIEW: Newton's second law

Use the words: weight, newton, balanced forces, force, acceleration, mass

A) ________________ is observed when an unbalanced force acts on a object.

B) Objects at rest or in uniform motion have _______________________________ acting  on them.

C) Named after one of the pioneers of modern Physics, the _________________ is the SI unit for force.

D) Gravity and magnetism are examples of _________________ that do not require contact to act on an object

E) The force due to gracity acting on an mass is called _________________________

3) In the space provided, answer the foloowing questions about force, mass, and acceleration.

A) What is the equation that states Newton's Second Law of Motion?

B) What is the force required to cause an acceleration of 10m/s/s in a 1kg mass ?

C) What is the rate of acceleration due to gravity ?

D) Which will accelerate faster due to gravity, a 1kg mass or a 2kg mass? (no air resistance)

E) A force of 20N acts on a mass and cuases an acceleration of 50m/s/s. What is the object's mass ?

F) How much force must you exert to hold a 2kg mass at one height ?

G) If you exerted an upward force of 20N on a 2kg mass, what would happen ?