These are very small questions and I just want to double-check them. Please complete all. 1. _____ is the study of how f

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These are very small questions and I just want to double-checkthem. Please complete all.
1. _____ is the study of how forces affect motion.
2. An inertial frame of reference is one in which the______________________ is zero.
3. _________________ forces are fictitious forces used toexplain motion in a rotating frame of reference.
4. When working with two-dimensional motion, choose thedirection of _________________ to be a positive direction.
5. If you are moving upward in an elevator at constantspeed, the normal force would be____________________ the force ofgravity.
6. If you are accelerating upwards in an elevator, thenormal force would be ____________________ the force ofgravity.
7. The normal force on an object is always_________________________ to the surface it is sitting on.
8. Tension force ________________________ throughouta string that changes direction over a pulley.
9. In the force system diagram pictured below, the factorthat would NOT influence the amount of kinetic friction is___________________.
10. If the strength of the frictional force is equal to theapplied force and oppositely directed, and assuming that all otherforces may be ignored, the object must be at rest or____________________.
11. The force of kinetic friction always acts in a directionexactly opposite to the direction of ______________.
12. If all other forces can be ignored and the strength ofthe frictional force is greater than the applied force andoppositely directed, the object must be_________.
13. The centripetal force is another name for the________________ on an object moving in circular motion.
14. An object in uniform circular motion is______________________ even though its speed is constant.
15. The direction of centripetal force is toward__________________________.
16. If you double the mass, you will have to_______________________ the centripetal force to keep it travellingin the same circular path at the same velocity.