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Chapter 4 Physics
| Question | Answer |
|---|---|
| An object cannot remain at rest unless? | The net force acting on it is zero. |
| If a block is moving to the left at a constant velocity, what can one conclude? | The net force applied to the block is zero. |
| A block of mass 2kg is acted upon by two forces: 3N (directed to the left) and 4N (directed to the right). What can you say about the block's motion? | It could be moving to the left, moving to the right, or be instantaneously at rest. |
| A massive block is being pulled along a horizontal frictionless surface by a constant horizontal force. The block must be __________. | moving with a constant nonzero acceleration |
| Two forces, of magnitude 4N and 10N, are applied to an object. The relative direction of the forces is unknown. The net force acting on the object __________. | cannot have a magnitude equal to 5N |
| If the acceleration of an object is zero, are no forces acting on it? | No |
| If an object is moving, is it possible for the net force acting on it to be zero? | Yes |
| If a person gives a sharp pull on the dangling thread, where is the thread likely to break: below the stone or above it? | Below |
| If a person gives a slow and steady pull on the dangling thread, where is the thread likely to break: below the stone or above it? | Above |
| When you stand still on the ground, how large a force does the ground exert on you? | F=mg |
| The force exerted perpendicular to a surface is called? | Normal Force |
Created by:
jrr409