7 Questions
What is the direction of a force?
The direction in which the force is applied
Frictional force is a type of non-contact force.
False
What is the unit of measurement for the magnitude of a force?
Newtons (N)
A force can cause an object to change its __________ or shape.
motion
Which of Newton's laws states that an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force?
First Law
Match the following types of forces with their descriptions:
Contact Forces = Occur when two objects are in physical contact Non-Contact Forces = Occur when two objects are not in physical contact Frictional Force = A type of contact force Gravitational Force = A type of non-contact force
The resultant force acting on an object is always zero.
False
Study Notes
Force
Definition
- A push or pull that causes an object to change its motion or shape
- A vector quantity, having both magnitude and direction
Types of Forces
-
Contact Forces: occur when two objects are in physical contact
- Frictional force
- Normal force (force exerted by a surface on an object)
- Tension force (force exerted by a stretched string or wire)
-
Non-Contact Forces: occur when two objects are not in physical contact
- Gravitational force
- Electromagnetic force
- Nuclear force
Characteristics of Force
- Magnitude: the amount of force applied, measured in units of Newtons (N)
- Direction: the direction in which the force is applied
- Resultant Force: the net force acting on an object, resulting from the addition of multiple forces
Newton's Laws of Motion
- First Law: an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force
- Second Law: the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = ma)
- Third Law: for every action, there is an equal and opposite reaction
Force
Definition and Characteristics
- Force is a push or pull that changes an object's motion or shape
- It is a vector quantity with both magnitude (amount of force) and direction
- Magnitude is measured in units of Newtons (N)
- Direction is the way the force is applied
Types of Forces
Contact Forces
- Occur when two objects are in physical contact
- Includes:
- Frictional force
- Normal force (force exerted by a surface on an object)
- Tension force (force exerted by a stretched string or wire)
Non-Contact Forces
- Occur when two objects are not in physical contact
- Includes:
- Gravitational force
- Electromagnetic force
- Nuclear force
Newton's Laws of Motion
First Law
- An object at rest will remain at rest
- An object in motion will continue to move with a constant velocity
- Unless acted upon by an external force
Second Law
- Force (F) equals mass (m) multiplied by acceleration (a)
- F = ma
Third Law
- For every action, there is an equal and opposite reaction
Learn about the definition and types of forces in physics, including contact and non-contact forces. Test your knowledge on frictional, normal, tension, gravitational, and electromagnetic forces.
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