The Force That Prevents a Ball Rolling on the Ground From Continuing on Its Path Forever is
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Force and Motion
Unit Assessment
| Question | Answer |
|---|---|
| The gravitational attraction between two objects depends on the distance between the objects and their _____________. | masses |
| Forces occur in pairs. If the first one is called the action force, the second would be the _______________. | reaction force |
| The Earth has a large mass, which requires a ____________ force to ______________ its motion. | large/change |
| A stationary object pushed by two equal forces in opposite directions will ___________. | remain stationary |
| One 10g rock could have more __________ than another 10g rock. | volume |
| If an object is moving at a constant speed and a force acts on it at right angles to its direction of motion, the object will _____________. | change direction |
| The strength of the force of friction depends on two factors: the types of __________ involved and how hard the surfaces push together. | surfaces |
| If an object is moving at a constant velocity, it means that ____________. | no net force is acting on it |
| If a force of 10 newtons acts on an object and an additional force of 6 newtons acts in the same direction, what will be the net force on the object? | 16 newtons |
| A man weighs 500N on the Earth. What would he weigh in space if he is not near any other object? | 0N |
| A change in position of an object is its _____________. | motion |
| Friction is caused by the ___________ of objects, liquids, or gases to slide past each other. | resistance |
| A river flows south at 10 meters per second. A canoe set out of a river's eastern shore straight across toward the other side. Which is the best describes the canoe's path? | The canoe's path will be a diagonal line from northeast to southeast |
| Which of the following best completes this sentence? In every interaction, forces occur in _______________. | pairs |
| Where would you find the least gravitational pull? | on the moon |
| On Earth a gallon of milk has the same mass as a gallon of milk in space, but it has a different _________. | weight |
| Which of the following would not be an action-reaction pair according to Newton's third law of motion? | a boy sits in a chair and the floor pushes the boy away |
| The force that causes all matter to be attracted to other matter is __________. | gravity |
| A rocket's mass is reduced by half, but the force pushing it through space remains the same. What will happen to the rocket's speed? | it will double |
| An object is accelerating when ____________. | it is changing speed or direction |
| If a moving object stops, it means that _____________. | a force must have acted on it |
| Ben and Justine are sitting opposite each other on a ride that is moving clockwise at a constant speed. Ben tosses a piece of candy to Justine. From her point of view, where will the candy land? | on her right |
| If a force acting on a moving object stop acting, the object will ___________. | keep moving in the same direction |
| A balloon is inflated and then released. What causes it to fly forward? | Air escaping from the back of the balloon pushes in the direction opposite the motion |
| The force needed to change the motion of an object rolling over a surface is _____________ that of an object sliding on a surface. | less than |
| Newton's first law states that an object must travel at a constant speed and in ___________, unless some outside force compels it to change. | a straight line |
| If two opposite forces act on a stationary object at the same time, and one pushes north at 16 newtons and the other pushes south at 12 newtons, which way will the object move? | north |
| The force that prevents a ball rolling on the ground from continuing on its path forever is _________. | friction |
| When you rub your hands together, they heat up due to ___________. | friction |
| The rate an object accelerates depends on __________. | its mass and the strength of the force |
Source: https://www.studystack.com/flashcard-1220811
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