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Questions and Answers
According to Newton's laws of motion, what happens to a body when no force is acting upon it?
According to Newton's laws of motion, what happens to a body when no force is acting upon it?
- It decelerates
- It remains at rest
- It accelerates
- It moves at a constant speed in a straight line (correct)
What does the time rate of change of momentum equal when a body is acted upon by a force?
What does the time rate of change of momentum equal when a body is acted upon by a force?
- Velocity
- Mass
- Acceleration
- Force (correct)
If two bodies exert forces on each other, what can be said about the magnitude and direction of these forces?
If two bodies exert forces on each other, what can be said about the magnitude and direction of these forces?
- They have different magnitudes and directions
- They have no relationship
- They have the same magnitude and direction
- They have the same magnitude but opposite directions (correct)
Who first stated the three laws of motion?
Who first stated the three laws of motion?
What did Newton use the laws of motion to investigate and explain?
What did Newton use the laws of motion to investigate and explain?
Flashcards
Newton's First Law
Newton's First Law
A body at rest stays at rest, or if in motion, it moves at a constant speed in a straight line, unless acted upon by a force.
Force and Momentum Change
Force and Momentum Change
The time rate of change of momentum equals the force acting on the body.
Newton's Third Law
Newton's Third Law
When two bodies interact, they exert forces on each other that are equal in magnitude and opposite in direction.
Who stated the laws of motion?
Who stated the laws of motion?
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Application of Newton's Laws
Application of Newton's Laws
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Study Notes
Newton's Laws of Motion
- A body remains in its state of rest or uniform motion unless acted upon by an external force.
- The time rate of change of momentum equals the force acting on a body.
Interaction of Forces
- When two bodies exert forces on each other, the forces have equal magnitude but opposite direction.
History of the Laws of Motion
- The three laws of motion were first stated by Sir Isaac Newton.
- Newton used the laws of motion to investigate and explain the motion of the Moon, the tides, and the behavior of comets.
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