Question

1. An object subject to a net force cannot have a constant speed .                       __________

2. An object moving at a constant rate cannot have one force acting on it.          __________

3. An object that has a constant speed in one direction has no forces

                        acting on it.                                                                                          __________

4. Free-body diagrams always tell us the direction of motion.                            __________

5. When the net force on an object is zero the object is at rest.                           __________

6. The sum of the Newton’s third law pair of forces is always zero                    __________

7. The more a spring is compressed the more force is can transfer to

                        an object.                                                                                             __________

8. Gravity always pulls on objects, it never pushes.                                          __________

9. The force of a bat hitting a ball is always equal in magnitude to the

                        force the ball exerts on the bat.                                                             __________

10. An object at rest has to have forces acting on it whose magnitudes

                        sum to zero.                                                                                         __________                       

For a statement to be true it must hold at all times, and if it is false it is so at all times. If a statement is sometimes true and sometimes false, then it is indeterminate in general. A statement is meaningless when it contends something that makes no sense. For example, neither saying that a car moving at a higher speed than another has more force, nor contending that one would add three accelerations on an object make any sense because of the meaning of the concepts of force and acceleration.

Answer 1