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Physics Chp 10 Sec 1
Pages 334-337
Question | Answer |
---|---|
force | a push or pull exerted on an object |
newton | a unit of measure that equals the force to accelerate 1kg at 1 meter per second per second |
net force | the overall force on an object when all the individual forces acting on it added together |
unbalanced forces | forces that produce a nonzero net forces, which changes an object's motion |
balanced forces | equal forces acting upon an object in opposite directions |
What SI unit is used to measure the strength of a force? | The strength of a force is measured in newtons. |
What is the result of unbalanced forces acting on an object? | Unbalanced forces cause a change in an object's motion. |
What is a force? | a push or a pull |
How is a force described? | a force is described by the direction in which it acts and its strength, or magnitude |
In a diagram, one force arrow is longer than the other arrow. What can you tell about the forces? | The longer arrow represents a force with greater strength, or magnitude. |
How can you find the net force if two forces act in opposite directions? | To calculate net force, you combine the opposite forces by subtracting. |
How do balanced forces acting on an object affect its motion? | Balanced forces cancel each other out and do not change the object's motion. |
How do unbalanced forces acting on an object affect its motion? | Unbalanced forces cause the object's motion to change. |
If you exert 120N on a desk and your friend exert 150N on the desk in the SAME direction, what is the net force exerted on the desk? | 270 N |