Which has more air resistance: a flat sheet of paper or a paper airplane? (1 point)
Responses
a) a sheet of paper because it has a wider area
b) a sheet of paper because it has a less wide area
c) a paper airplane because it has a less wide area
d) a paper airplane because it has a wider area
b) a sheet of paper because it has a less wide area
A shoe and a shirt are released from the same height. They take different amounts of time to fall to the ground. How can this be explained?(1 point)
Responses
a) The weight is greater on the shoe than on the shirt, but there is equal air resistance on the objects.
b) The masses of the two objects are the same, but they are affected differently by air resistance.
c) The weight is equal on the two objects, but there is more air resistance on the shoe.
d) The difference in weight doesn't affect the time, but they are affected differently by air resistance.
d) The difference in weight doesn't affect the time, but they are affected differently by air resistance.
Use the table of data for two falling rocks to answer the question.
Rock 1 Rock 2
Mass (kg) 2.5 25
Height of Fall (m) 78.4 78.4
Time to Fall (s) 4.0 ?
Based on this data, how many seconds will it take rock 2 to fall?
(1 point)
Responses
4.0 seconds
0.4 second
40 seconds
1.6 seconds
1.6 seconds
A hammer and a feather are dropped from the same height by an astronaut on a planet without air. How will their falls compare?(1 point)
Responses
a) The hammer will fall faster because gravity is pulling it down with a greater force than it is pulling the feather.
b) The feather will fall faster because it has less mass, allowing it to speed up more easily than the hammer.
c) The objects will fall at the same time because gravity will have the same affect on them.
d) The objects will fall at the same time because gravity is not acting on them, so they will be affected the same.