A new science of motion
1.[2p] Why did Galileo study fall on an inclined plane instead of dropping things?
Why did Galileo study fall on an inclined plane instead of dropping things?
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 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 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?
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?
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?
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?
In equal successive intervals of time, the distances covered by a body falling from rest are in what ratio?
The answer is: 1, 3, 5, 7
The answer is: 1, 3, 5, 7
The answer is: 1, 3, 5, 7
6.[3p] What hidden assumption in the tower objection does Galileo's ship argument expose?
What hidden assumption in the tower objection does Galileo's ship argument expose?
The answer is: That a body loses whatever motion it had at the moment it is released
The answer is: That a body loses whatever motion it had at the moment it is released
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.
Galileo's principle of persisting motion was the same as Newton's first law, motion in a straight line at constant speed.
The answer is: False
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?
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?
Which of these does the science of Two New Sciences not contain?
Select all that apply
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