When a truck drives into a haystack, it doesn’t get damaged. When it drives into a concrete wall, there is a lot of damage. Both cases have the same initial speed for the truck and the same final speed as well. What is the difference between these two cases? A) The initial momentum is less when it strikes the haystack. B) The impulse is less when striking the haystack C) The change in momentum is less when striking the haystack D) Force of impact is less when striking the haystack
When a truck drives into a haystack, it doesn’t get damaged. When it drives into a concrete wall, there
is a lot of damage. Both cases have the same initial speed for the truck and the same final speed as
well. What is the difference between these two cases?
A) The initial momentum is less when it strikes the haystack.
B) The impulse is less when striking the haystack
C) The change in momentum is less when striking the haystack
D) Force of impact is less when striking the haystack
If you want to hit a volleyball without making it spin, you must apply a force
A) Acting below the center of mass
B) Acting above the center of mass
C) Acting through the center of mass
D) It is impossible to not make it spin
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