a space craft flies within 500,000 km of each of these planets. based on its mass, which planet would gravitationally attract the spacecraft the least? A. Mars B. Jupiter C. Venus D. Neptune
You are correct, I apologize for my mistake. The planet that would least attract the spacecraft would be Mars, not Venus. Thanks for correcting me.
A student conducts an investigation to study the effect of gravity on objects of different masses. Which step should be first in the investigation?(1 point)
Responses
Measure the distance between the objects.
Time how long it takes for the objects to fall.
Find objects of different masses and measure them.
Drop the objects from a height.
C. Find objects of different masses and measure them.
A science class is conducting an investigation to see how gravity affects objects of different masses. They drop three balls from the same height. They time how long it takes the balls to hit the ground. What are the students comparing?(1 point)
Responses
the gravitational attraction of each ball
the gravitational attraction of each ball
the mass of each ball
the mass of each ball
the time it takes for each ball to fall
the time it takes for each ball to fall
the height from which each ball is dropped
the height from which each ball is dropped
C. the time it takes for each ball to fall.
D. the upward push of air resistance.
A coin (5 grams), a small parachute (21 grams), and a hammer (710 grams) are all dropped from a height of 10 meters. The coin and the hammer take about the same amount of time to fall. Which statement describes the time it takes for the parachute to fall?(1 point)
Responses
It takes less time to fall because it has the most surface area.
It takes less time to fall because it has the most surface area.
It takes less time to fall because it has the least mass.
It takes less time to fall because it has the least mass.
It takes longer to fall because it experiences greater air resistance.
It takes longer to fall because it experiences greater air resistance.
It takes the same amount of time to fall because the effect of gravity is the same.
It takes the same amount of time to fall because the effect of gravity is the same.
C. It takes longer to fall because it experiences greater air resistance.
Which object would have the slowest speed at terminal velocity?(1 point)
Responses
a 50-kilogram block with no parachute
a 50-kilogram block with no parachute
a 50-kilogram block with a large parachute
a 50-kilogram block with a large parachute
a 10-kilogram block with a small parachute
a 10-kilogram block with a small parachute
a 10-kilogram block with no parachute