Question

1. name the force responsible for the following: a. lightning b. sand wearing away rock as water flows over the rock c. increasing pressure as you go deeper into the ocean d. a chunk of a glacier falling off into the ocean to form an iceberg e. a rope holding up a cave explorer f. a landslide (two possible answers)

Explanation:

a. Lightning is caused by the electrostatic force between charged regions in clouds or between clouds and the ground.
b. The force of erosion (mechanical weathering) due to the abrasive action of sand - water mixture on rock.
c. Hydrostatic pressure which increases with depth in a fluid (ocean water in this case) due to the weight of the overlying fluid.
d. Gravity causes the chunk of glacier to fall as it overcomes the internal cohesive forces holding it to the glacier.
e. Tension force in the rope counteracts the gravitational force acting on the cave explorer.
f. Gravity is the main force pulling the soil and rocks down - slope. Friction can oppose the landslide, and when it is overcome, the landslide occurs. So gravity and lack of sufficient friction are two possible answers.

Answer:

a. Electrostatic force
b. Erosion (mechanical weathering)
c. Hydrostatic pressure
d. Gravity
e. Tension force
f. Gravity, Lack of sufficient friction