Answer:
Explanation:
where ΔL is the amount of deformation (the change in length, for example) produced by the force F, and k is a proportionality constant that depends on the shape and composition of the object and the direction of the force. Note that this force is a function of the deformation ΔL—it is not constant as a kinetic friction force is. Rearranging this to
We now move from consideration of forces that affect the motion of an object (such as friction and drag) to those that affect an object’s shape. If a bulldozer pushes a car into a wall, the car will not move but it will noticeably change shape. A change in shape due to the application of a force is a deformation. Even very small forces are known to cause some deformation. For small deformations, two important characteristics are observed. First, the object returns to its original shape when the force is removed—that is, the deformation is elastic for small deformations. Second, the size of the deformation is proportional to the force—that is, for small deformations, Hooke’s law is obeyed. In equation form, Hooke’s law is given by
makes it clear that the deformation is proportional to the applied force. Figure 1 shows the Hooke’s law relationship between the extension ΔL of a spring or of a human bone. For metals or springs, the straight line region in which Hooke’s law pertains is much larger. Bones are brittle and the elastic region is small and the fracture abrupt. Eventually a large enough stress to the material will cause it to break or fracture.
ΔL=
k
F
<h3><u>Answer;</u></h3>
A. Their bodies will move forward.
<h3><u>Explanation</u>;</h3>
- <em><u>When a train or a bus comes to a sudden stop everything including the passengers that is not directly attached to the train or the vehicle will tend to continue in the direction of travel, thus the bodies of the passengers will move forward.</u></em>
- This is<em><u> due to the forces of inertia.</u></em> From the second Newton's law of motion, a body will main at its state of rest or constant speed unless acted upon by an unbalanced external force.
- <em><u>When the train suddenly stops the tendency of inertia of motion of the passengers results in the forward motion throwing them from their seats.</u></em>
Hey there!!!
your answer is going to be a, specular reflection.
hope this helps!!!
Answer:
ok thanks for giving point