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Janssen Physics Ch.4
Mrs. Janssen's Chapter 4 Physics Test
| Question | Answer |
|---|---|
| What causes acceleration? | force |
| What causes a moving object to change direction? | force |
| What force exists between objects even in the absence of direct physical contact? | field force |
| What is the unit for Newtons? | kg*m/s2 |
| What does the length of a force vector represent? | magnitude of the force |
| A free body diagram does NOT represent what? | forces exerted by the object |
| What direction does the arrow point in a vector diagram to indicate gravitational force? | down |
| What is the tendency of an object to maintain its state of motion? | inertia |
| A car goes forward along a level road at a constant velocity. What additional force is necessary to bring the car into equilibrium? | zero |
| If a non-zero NET force is acting on an object, what is the object doing? | accelerating |
| The acceleration of an object is directly proportional to what? | net external force acting on the object |
| The acceleration of an object is inversely proportional to what? | object's mass |
| Which are simultaneous equal but opposite forces resulting from the interaction of two objects? | action-reaction pairs |
| Newton's Third law of motion involves the interaction of what? | two objects and two forces |
| The magnitude of the gravitational force acting on an object is what? | weight |
| What is a measure of the quantity of matter? | mass |
| A change in the gravitational force acting on an object will affect the object's what? | weight |
| Do the units of the coefficient of friction have an actual value? | no |
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