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Types of forces: at a distance or through contact (4841)
Martes 4 de febrero de 2020, por
Indicate which of these phenomena are produced by forces at a distance and which are produced by forces through contact:
a) The motion of a train due to magnetic levitation.
b) The deformation of a spring when a weight is attached to it.
c) The skidding of a car on a pool of water.
d) The formation of the aurora borealis.
e) The motion of a cupboard when pushed.
Contact forces: b) and e).
Distance forces: a), c) and d).