A quickly moving van and a slowly moving bird have a head-on collision. The bird splatters all over the windshield as a result. During the collision, the greater force is experienced by…

a) …the bird!
b) …the van!
c) The force is the same for both!
d) Not enough information to answer.

Explain your choice in the space provided.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to. in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

What do you think car designers do if the damage caused by a crash test is too severe?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?