Use the table of data from an investigation to answer the question.
Mass of ball (grams) Time to hit ground (seconds)
10 1.02
15 1.01
26 1.62
A student is investigating gravity and falling objects. She drops three balls and times how long it takes each ball to hit the ground. What is the most likely source of error?
(1 point)
Responses
She did not measure the mass after the balls hit the ground.
She did not measure the mass after the balls hit the ground.
She dropped the balls from different heights.
She dropped the balls from different heights.
She used balls that are different sizes.
She used balls that are different sizes.
She did not measure the circumference of the balls.
She dropped the balls from different heights.
A student wants to know if the effect of gravity is the same on all objects. She follows these steps:
Drop a 5-gram ball, a 10-gram ball, and a 12-gram ball from a height of 10 meters.
Record how long it takes for each object to hit the ground.
?
Which step should be next?
(1 point)
Responses
Drop the balls from a different height.
Drop the balls from a different height.
Measure the mass of the balls again.
Measure the mass of the balls again.
Choose new balls.
Choose new balls.
Perform a second trial.
Perform a second trial.
Use the table of data from an investigation on the effect of gravity on falling objects to answer the question.
Student Ball 1 (seconds) Ball 2 (seconds) Ball 3 (seconds)
Ziva 0.52 0.51 0.51
Jade 0.51 0.52 0.52
Eduardo 0.50 0.50 0.50
Owen 0.50 0.37 0.51
Four students investigated the effect of gravity on falling objects. The students all used the same three balls and dropped them from a height of 8 meters. They recorded the time it took for each ball to hit the ground. Which student most likely had an error in the results?
(1 point)
Responses
Owen
Owen
Ziva
Ziva
Eduardo
Eduardo
Jade
Owen
Use the table of criteria for an investigation to answer the question.
Object To Be Dropped Drop Height (meters)
10-gram ball 5
5-gram ball 8
18-gram ball 10
A student designs an investigation to study the effect of gravity on objects on Earth. He will use the criteria shown. How can the student improve the investigation?
(1 point)
Responses
by measuring the circumference of the balls
by measuring the circumference of the balls
by finding balls made from different materials
by finding balls made from different materials
by using balls that are the same mass
by using balls that are the same mass
by dropping the balls from the same height