| Question | Answer |
|---|---|
| Acceleration | A change in speed or direction of an object's motion |
| Force | A push or pull |
| Friction | Force that resists motion, relative to each other, of objects that are touching |
| Speed | The change of position during a unit of time |
| Velocity | The speed and direction of an object |
| Simple Machine | A machine with few or no moving parts to make work easier |
| Wedge | Two inclined planes placed back to back |
| Fulcrum | The fixed point on a lever |
| Pulley | A wheel with a line around it |
| Lever | A bar that pivots on a fixed point |
| Screw | A post with threads wrapped around it |
| Inclined Plane | A slanted surface |
| What is the measurement of the force of gravity on an object? | Weight |
| Two friends exert a force on each other's hands and the hands don't move. Describe the forces | The forces are balanced |
| A heavy ball and a light ball are rolling at the same speed on the same surface. Why will the heavy ball be harder to stop? | It has greater momentum |
| What simple machine raises a flag on a flag pole? | Pulley |
| What other kind of simple machine do you need to make a wedge? | Inclined plane |
| What type of simple machine is a fishing rod? | Lever |
| Which part of a fishing rod is a fulcrum? | Your hand holding the rod |
| Which types of simple machines change the direction of a force? | Wedge, inclined plane, pulley |
| Screws have threads that are simple machines. What kind of machine are the threads on screws? | Inclined planes |
| If someone is pushing a box across the floor and someone else is pushing on the box with equal force, but in the opposite direction – what is the outcome? | The box stays in the same place |
| Which simple machines are also an inclined plane? | A screw, wedge |
| What simple machine opens draperies or blinds when you pull a cord? | Pulley |
| Which simple machine would you use to slice celery? | Wedge |
