Modern automobiles are generally designed so that the engine compartment at the front end of the car collapses during a collision. What is the purpose of this design? A. The collapsing structure increases the transfer of the energy to the car or object with which the car collides.
B. It is less expensive and more cost effective to use weaker materials in the construction of the engine compartment.
C. By confining the damage to the front part of the car, the collapsing engine compartment reduces the total cost of repairs.
D. As the materials of the engine compartment bend they absorb energy and protect the passengers from the force of the collision​

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.