Wednesday, October 16, 2013

(No subject)

23. Two bullets are fired horizontally at the same time. The bullets
have different masses and different initial velocities. Which one will
hit the ground first? Ignore air resistance.
a. They hit the ground at the same time
b. The fastest one
c. The lightest one
d. The heaviest one
e. The slowest one
The bullets will hit the ground the same time because the force pulling
down on them is the same (9.8). The initial velocity affects the
distance of the bullet in the x direction (the ground) but have no
affect on the y direction (perpendicular to the ground) . Mass had no
affect in either direction.

1 comment:

  1. Good! They both fall with the same acceleration. The mass and initial velocity will not impact how fast they fall.

    ReplyDelete