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Force and Motion
Force and Motion Test Review
| Question | Answer |
|---|---|
| What is velocity? | Speed + Direction |
| How do unbalanced forces affect the motion of an object? | Objects will speed up, slow down, or change direction if unbalanced forces are acting on them. |
| There are 4 wagons. Each one has a different mass. If students pull the wagons with the same amount of force, which wagon will move the fastest? | The one with the least amount of mass |
| Which of the following is an example of velocity? A. 100 m/s B. 100 m/s2 C. !00 m/s east D 100 m | C |
| Think back to the video of the skydiver that we watched in class. During which parts of the fall were the forces balanced on the skydiver? | When the forces of gravity and air resistance were equal and opposite (Balanced) |
| What is the net force on an object that has balanced forces acting on it? | 0 Newtons |
| What unit is used to measure force? | Newtons (N) |
| A car travels 40 miles in 30 minutes. What is the speed of the car in miles per hour? | 80 mph |
| What is the difference between speed and velocity? | Speed only tells you how fast something is moving. Velocity tells you speed and also gives you the direction of travel. |
| On a speed - time graph, what does a flat line represent? | Constant Speed |
| On a speed - time graph what does a upwards slanted line represent? | Acceleration - speeding up |
| On a speed - time graph, what does a line slanted down towards the x axis represent? | Acceleration - slowing down |
| On a distance (position) - time graph what does a flat line represent? | An object that is not moving |
| On a distance - time graph, what does a straight slanted line represent? | Constant speed |
| On a distance - time graph, what does a line slanted down towards the x axis represent? | Return to starting point |
| On a distance - time graph, what does the y-intercept represent? | Where the object starts moving |
| What is acceleration? | A change in velocity |
| How can you tell if an object is accelerating? | If it is speeding up, slowing down, or changing direction it is accelerating |
| How is acceleration represented on a distance-time graph? | A curved line (upwards for speeding up, downwards for slowing down) |
| What is a force? | A push or a pull |
| What is the relationship between slope and speed? | A steeper slope represents a faster speed |
| How do you calculate net force? | If the forces are going in the same direction you add them, if they are going in opposite directions you subtract |
| What subatomic particle identifies an atom? | proton |
| When looking at a bohr model of an atom, how do you determine the number of valence electrons? | You count the electrons in the outer most shell |
| If 2 atoms are in the same period, what do they have in common? | They have the same number of energy levels (shells) for their electrons |
| What determines the reactivity of an atom? | The number of valence electrons |
| According to the law of conservation of mass, how does the mass of the reactants compare to the mass of the products? | They are the same |
| Atoms in the same _______________ have similar properties. | group/family |
Created by:
hgorman
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