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When does gravity begin to pull a glacier downhill?
When the weight of snow and ice is great enough the glacier starts moving downhill under the influence of gravity. This point is determined by the relationship between accumulation and wastage of the glacier.
What is basal drag force?
Basal drag force is the resistance on a glacier's base as it moves over its bed. It occurs due to the friction between the glacier and the underlying rock or sediment. The amount of basal drag force can affect the speed and movement of the glacier.
What force moves a glacier downhill?
Glaciers can slide down slope for several reasons. First, a glacier is made of ice, which is frozen water. Liquid water is slippery. That is important to remember. Second, gravity is pulling on them making them want to move downhill. Third, when ice is put under a lot of pressure, it can melt. The pressure above the bottom of the glacier can cause some melting on the bottom layer. That can make the glacier slide. Fourth, the sun shining on the top of the glacier can make the top of the glacier melt. The water from that melting can go to the bottom of the glacier and help lubricate the bottom. That can help it slide. Mountain glaciers are always sliding downhill. Snow replenishes glaciers and adds ice to the top. If glaciers melt faster than they are replenished they vanish. Some mountain glaciers have vanished within the last 100 years. A few more are likely to vanish in the next decade.
How gravity effects glaciers?
The mutual forces of gravitational attraction between a glacier and the Earth cause the glacier to slowly 'flow' downhill. Also, if any of the ice should melt underneath the glacier, then the resulting liquid water flows similarly downhill, although faster than the ice does.
What is glacier drift?
Glacier drift refers to the movement of a glacier across the landscape. This movement is caused by the force of gravity pulling the glacier downhill, as well as the internal deformation of the ice. Glaciers can move both slowly and rapidly, shaping the land and contributing to landform formation.
Once the depth of snow and ice reaches more than 30 to 40 meters the force of friction begins to pull a glacier downhill true or false?
True. As a glacier's depth increases beyond 30 to 40 meters, the force of friction will eventually overcome the glacier's ability to resist movement, causing it to flow downhill under the influence of gravity. This movement is what allows glaciers to slowly advance and shape the landscape.
Once in depth of snow and ice reaches up to more than 30-40 meters the force of friction begins to pull a glacier downhill?
Once the depth of snow and ice exceeds 30-40 meters, the weight of the ice causes it to deform under its own mass. This deformation creates a slippery base that allows glaciers to slide downhill due to the force of gravity. The friction between the glacier and the underlying bedrock also aids in the glacier's movement.
When does gravity begin to pull a glacier downhill?
When the weight of snow and ice is great enough the glacier starts moving downhill under the influence of gravity. This point is determined by the relationship between accumulation and wastage of the glacier.
What kind of force is skiing downhill?
Gravity but the snow provides friction
What is glacier movement primarily caused by?
Glacier movement is primarily caused by the force of gravity pulling the ice downhill. As a glacier accumulates snow and ice, the weight of the ice causes it to slowly flow under its own mass. Additionally, meltwater at the base of the glacier can help reduce friction with the underlying bedrock, facilitating movement.
What force will make glaciers move downhill once the layet of snow and ice is more than about 30 to 40 meters deep?
Once the layer of snow and ice reaches a depth of about 30 to 40 meters, the force of gravity becomes the primary driver for glacier movement. The immense weight of the overlying ice creates pressure at the base of the glacier, leading to melting and lubrication of the ice-sediment interface. This facilitates the glacier's flow downhill, allowing it to move in response to gravitational pull. Additionally, internal deformation of the ice contributes to the overall movement.
To keep a sled accelerating downhill the force of gravity must be greater than the normal force?
A sled accelerates downhill when the force of gravity pulling it downhill is greater than the force of friction and air resistance acting against it. This difference creates a net force that causes the sled to accelerate. The normal force from the surface helps support the sled against gravity but does not impact its acceleration directly.
What is the key force in pulling an avalanche downhill?
Gravity is the key force pulling an avalanche downhill. As snow accumulates on a slope, it can reach a critical point where the force of gravity overcomes the friction between layers of snow, causing the avalanche to slide downhill.
Is it true that a sled accelerating downhill the force of gravity must be greater than the normal force?
Yes, when a sled is accelerating downhill, the force of gravity pulling the sled downhill must be greater than the normal force acting in the opposite direction to overcome friction and any other resistive forces. This difference in force is what allows the sled to accelerate downhill.
What is basal drag force?
Basal drag force is the resistance on a glacier's base as it moves over its bed. It occurs due to the friction between the glacier and the underlying rock or sediment. The amount of basal drag force can affect the speed and movement of the glacier.
What force moves a glacier downhill?
Glaciers can slide down slope for several reasons. First, a glacier is made of ice, which is frozen water. Liquid water is slippery. That is important to remember. Second, gravity is pulling on them making them want to move downhill. Third, when ice is put under a lot of pressure, it can melt. The pressure above the bottom of the glacier can cause some melting on the bottom layer. That can make the glacier slide. Fourth, the sun shining on the top of the glacier can make the top of the glacier melt. The water from that melting can go to the bottom of the glacier and help lubricate the bottom. That can help it slide. Mountain glaciers are always sliding downhill. Snow replenishes glaciers and adds ice to the top. If glaciers melt faster than they are replenished they vanish. Some mountain glaciers have vanished within the last 100 years. A few more are likely to vanish in the next decade.
How gravity effects glaciers?
The mutual forces of gravitational attraction between a glacier and the Earth cause the glacier to slowly 'flow' downhill. Also, if any of the ice should melt underneath the glacier, then the resulting liquid water flows similarly downhill, although faster than the ice does.
