Question
31. A force acting on an object does NO work if:
a
a machine is used to move the object
b
the force is greater than the force of friction
c
the object accelerates
d
the force is not in the direction of the object's motion
32. Magnetic fields run from ______________________ to ______________________.
a
north, south
b
east, west
c
west, east
d
south, north
a
a machine is used to move the object
b
the force is greater than the force of friction
c
the object accelerates
d
the force is not in the direction of the object's motion
32. Magnetic fields run from ______________________ to ______________________.
a
north, south
b
east, west
c
west, east
d
south, north
Answers
GPT-4o mini
For your questions:
31. A force acting on an object does NO work if:
**d - the force is not in the direction of the object's motion.**
Work is defined as the product of the force applied and the displacement in the direction of that force. If the force is perpendicular to the direction of motion, or in the opposite direction, then no work is done.
32. Magnetic fields run from ______________________ to ______________________.
**a - north, south.**
Magnetic field lines are conventionally described as running from the north pole of a magnet to the south pole.
31. A force acting on an object does NO work if:
**d - the force is not in the direction of the object's motion.**
Work is defined as the product of the force applied and the displacement in the direction of that force. If the force is perpendicular to the direction of motion, or in the opposite direction, then no work is done.
32. Magnetic fields run from ______________________ to ______________________.
**a - north, south.**
Magnetic field lines are conventionally described as running from the north pole of a magnet to the south pole.