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Unit Assessment

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
The gravitational attraction between two objects depends on the distance between the objects and their _____________.   masses  
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Forces occur in pairs. If the first one is called the action force, the second would be the _______________.   reaction force  
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The Earth has a large mass, which requires a ____________ force to ______________ its motion.   large/change  
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A stationary object pushed by two equal forces in opposite directions will ___________.   remain stationary  
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One 10g rock could have more __________ than another 10g rock.   volume  
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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  
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The strength of the force of friction depends on two factors: the types of __________ involved and how hard the surfaces push together.   surfaces  
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If an object is moving at a constant velocity, it means that ____________.   no net force is acting on it  
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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  
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A man weighs 500N on the Earth. What would he weigh in space if he is not near any other object?   0N  
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A change in position of an object is its _____________.   motion  
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Friction is caused by the ___________ of objects, liquids, or gases to slide past each other.   resistance  
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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  
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Which of the following best completes this sentence? In every interaction, forces occur in _______________.   pairs  
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Where would you find the least gravitational pull?   on the moon  
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On Earth a gallon of milk has the same mass as a gallon of milk in space, but it has a different _________.   weight  
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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  
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The force that causes all matter to be attracted to other matter is __________.   gravity  
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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  
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An object is accelerating when ____________.   it is changing speed or direction  
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If a moving object stops, it means that _____________.   a force must have acted on it  
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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  
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If a force acting on a moving object stop acting, the object will ___________.   keep moving in the same direction  
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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  
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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  
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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  
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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  
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The force that prevents a ball rolling on the ground from continuing on its path forever is _________.   friction  
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When you rub your hands together, they heat up due to ___________.   friction  
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The rate an object accelerates depends on __________.   its mass and the strength of the force  
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