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 time it takes for each ball to fall
the time it takes for each ball to fall
the mass of each ball
the mass of each ball
the gravitational attraction of each ball
the gravitational attraction of each ball
the height from which each ball is dropped
the height from which each ball is dropped
the time it takes for each ball to fall
A hammer and a feather are dropped from the same height. Imagine that there is no resistance to the objects' motion in air. Which value will be different for the two objects?(1 point)
Responses
the velocity of the objects
the velocity of the objects
the upward push of air resistance
the upward push of air resistance
the gravitational attraction between the Earth and the objects
the gravitational attraction between the Earth and the objects
the time it takes for them to fall
the time it takes for them to fall
the gravitational attraction between the Earth and the objects
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 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.
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 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 a large parachute
a 50-kilogram block with a large parachute
a 50-kilogram block with no parachute
a 50-kilogram block with no parachute
a 10-kilogram block with a small parachute
a 10-kilogram block with a small parachute
a 10-kilogram block with no parachute
a 50-kilogram block with a large parachute
How does an open parachute slow a skydiver’s fall?(1 point)
Responses
The parachute changes the mass of the skydiver.
The parachute changes the mass of the skydiver.
The parachute pulls the skydiver up.
The parachute pulls the skydiver up.
The parachute increases the force opposing gravity.
The parachute increases the force opposing gravity.
The parachute weakens the force of gravity.