The position-time graph for an object that remains still over time would be represented by a horizontal line. This indicates that the position does not change as time progresses.
What would the position-time graph look like for an object that remains still over time?(1 point)
Responses
an upward curve
an upward curve
a horizontal line
a horizontal line
a decreasing line
a decreasing line
an increasing line
7 answers
Which statement about forces is correct?(1 point)
Responses
Forces do not have magnitude, but they have direction.
Forces do not have magnitude, but they have direction.
Forces do not have magnitude or direction.
Forces do not have magnitude or direction.
Forces have magnitude, but not direction.
Forces have magnitude, but not direction.
Forces have both magnitude and direction
Responses
Forces do not have magnitude, but they have direction.
Forces do not have magnitude, but they have direction.
Forces do not have magnitude or direction.
Forces do not have magnitude or direction.
Forces have magnitude, but not direction.
Forces have magnitude, but not direction.
Forces have both magnitude and direction
The correct statement about forces is: Forces have both magnitude and direction. This makes them vector quantities.
What is a force?(1 point)
Responses
the energy needed to start motion
the energy needed to start motion
a push or a pull on an object
a push or a pull on an object
the uneven heating of an object
the uneven heating of an object
a unit of measurement
Responses
the energy needed to start motion
the energy needed to start motion
a push or a pull on an object
a push or a pull on an object
the uneven heating of an object
the uneven heating of an object
a unit of measurement
A force is best described as a push or a pull on an object.
Which situation describes a non-contact force acting on an object?(1 point)
Responses
a person closing a door
a person closing a door
a person picking up a textbook
a person picking up a textbook
a person cutting an apple with an apple slicer
a person cutting an apple with an apple slicer
a person pouring water out of a pitcher
Responses
a person closing a door
a person closing a door
a person picking up a textbook
a person picking up a textbook
a person cutting an apple with an apple slicer
a person cutting an apple with an apple slicer
a person pouring water out of a pitcher
The situation that describes a non-contact force acting on an object is none of the provided responses, as all the options involve contact forces.
However, a typical example of a non-contact force would be gravity or magnetic force. If you are looking for an option that could be contextualized, you might consider the force of gravity acting on the textbook when a person is picking it up, but in that context, the act itself involves contact.