Lesson test: A new science of motion

1.[2p]
Why did Galileo study fall on an inclined plane instead of dropping things?

Free fall is over too quickly for any clock of the period, and the incline dilutes the acceleration by a known factor

Correct

Dropping objects from towers was forbidden in Florence

The answer is: Free fall is over too quickly for any clock of the period, and the incline dilutes the acceleration by a known factor

Rolling balls are heavier than falling ones

The answer is: Free fall is over too quickly for any clock of the period, and the incline dilutes the acceleration by a known factor

The incline removes air resistance

The answer is: Free fall is over too quickly for any clock of the period, and the incline dilutes the acceleration by a known factor

2.[2p]
A plane is raised 1 unit in 12 along its length. What is the acceleration along it, in metres per second squared, taking g as 9.81?

CorrectNot quite: 0.818

5.[2p]
In equal successive intervals of time, the distances covered by a body falling from rest are in what ratio?

1, 3, 5, 7

Correct

1, 2, 3, 4

The answer is: 1, 3, 5, 7

1, 4, 9, 16

The answer is: 1, 3, 5, 7

1, 1, 1, 1

The answer is: 1, 3, 5, 7

6.[3p]
What hidden assumption in the tower objection does Galileo's ship argument expose?

That a body loses whatever motion it had at the moment it is released

Correct

That the earth's rotation is slower than it really is

The answer is: That a body loses whatever motion it had at the moment it is released

That heavy bodies fall faster than light ones

The answer is: That a body loses whatever motion it had at the moment it is released

That air is carried along with the earth

The answer is: That a body loses whatever motion it had at the moment it is released

7.[2p]
Galileo's principle of persisting motion was the same as Newton's first law, motion in a straight line at constant speed.

True

The answer is: False

False

Correct

8.[3p]
A cannon fires at 200 m/s at 45 degrees over level ground. What range does the parabolic theory predict, in metres, with g as 9.81?

CorrectNot quite: 4078

9.[3p]
Which of these does the science of Two New Sciences not contain?

Select all that apply

A concept of force

Correct

A relation between force and acceleration

Correct

Any account of why bodies fall

Correct

A numerical value for the acceleration of gravity

Correct

The law that distance from rest goes as the square of the time

The answer is: A concept of force, A relation between force and acceleration, Any account of why bodies fall, A numerical value for the acceleration of gravity

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A new science of motion

1.[2p]
Why did Galileo study fall on an inclined plane instead of dropping things?

2.[2p]
A plane is raised 1 unit in 12 along its length. What is the acceleration along it, in metres per second squared, taking g as 9.81?

3.[3p]
A body starts from rest and slides 7.0 m down that plane at that acceleration. How long does it take, in seconds?

4.[3p]
A body falls 4.9 m during the first second. How far does it fall during the fourth second alone, in metres?

5.[2p]
In equal successive intervals of time, the distances covered by a body falling from rest are in what ratio?

6.[3p]
What hidden assumption in the tower objection does Galileo's ship argument expose?

7.[2p]
Galileo's principle of persisting motion was the same as Newton's first law, motion in a straight line at constant speed.

8.[3p]
A cannon fires at 200 m/s at 45 degrees over level ground. What range does the parabolic theory predict, in metres, with g as 9.81?

9.[3p]
Which of these does the science of Two New Sciences not contain?

1.[2p] Why did Galileo study fall on an inclined plane instead of dropping things?

2.[2p] A plane is raised 1 unit in 12 along its length. What is the acceleration along it, in metres per second squared, taking g as 9.81?

3.[3p] A body starts from rest and slides 7.0 m down that plane at that acceleration. How long does it take, in seconds?

4.[3p] A body falls 4.9 m during the first second. How far does it fall during the fourth second alone, in metres?

5.[2p] In equal successive intervals of time, the distances covered by a body falling from rest are in what ratio?

6.[3p] What hidden assumption in the tower objection does Galileo's ship argument expose?

7.[2p] Galileo's principle of persisting motion was the same as Newton's first law, motion in a straight line at constant speed.

8.[3p] A cannon fires at 200 m/s at 45 degrees over level ground. What range does the parabolic theory predict, in metres, with g as 9.81?

9.[3p] Which of these does the science of Two New Sciences not contain?

1.[2p]
Why did Galileo study fall on an inclined plane instead of dropping things?

2.[2p]
A plane is raised 1 unit in 12 along its length. What is the acceleration along it, in metres per second squared, taking g as 9.81?

3.[3p]
A body starts from rest and slides 7.0 m down that plane at that acceleration. How long does it take, in seconds?

4.[3p]
A body falls 4.9 m during the first second. How far does it fall during the fourth second alone, in metres?

5.[2p]
In equal successive intervals of time, the distances covered by a body falling from rest are in what ratio?

6.[3p]
What hidden assumption in the tower objection does Galileo's ship argument expose?

7.[2p]
Galileo's principle of persisting motion was the same as Newton's first law, motion in a straight line at constant speed.

8.[3p]
A cannon fires at 200 m/s at 45 degrees over level ground. What range does the parabolic theory predict, in metres, with g as 9.81?

9.[3p]
Which of these does the science of Two New Sciences not contain?