Question

Why can squirrel jump from a tree branch to the ground and run away undamaged,while a human could break a bone in such a fall?

Answer 1

Answer:

The reason behind this is the drag force. When a squirrel jumps from the tree, the surface area exposed to the air is large as compared to the size and weight of the squirrel. So when a squirrel jumps from the tree, squirrel experiences a high drag force, and due to this, the smooth landing of the squirrel is possible. While in the case of humans, the exposed area is less as compared to the size and weight. So the drag force acting is nearly negligible.

Answer 2

A squirrel jumps from a tree branch to the ground and runs away undamaged, while a human could break a bone in such a fall because:

• This is due to the drag force acting on any object, as well as the weight of the object.
• The opposing force of motion is a drag force, which is determined by the surface area or exposed area of an object in relation to other objects or surfaces.

1. More surface area exposed + object's low weight = increased drag force
2. Smaller surface area exposed + a heavier object = a lower drag force.

• Squirrels are light, and their exposed body area is more when they jump. As a result of the increased drag force, it will descend at a slower rate, which will not harm the squirrel.
• When a person jumps, their weight is greater and they have a smaller surface area exposed to the ground. As a result of the low drag force, the object impacts the ground with a higher velocity, which can injure or break bones.