Question 1

When Burl and Paul stand on opposite ends of a sign-painting scaffold, the tensions in the supporting ropes

Accepted Answer

A)  are equal.
B)  depend on the relative weights of Burl and Paul.
C)  combine to equal zero.
D)  are in equilibrium. B

Question 2

Which concept is being illustrated when a tablecloth is quickly yanked beneath dishes resting on a table?

Accepted Answer

A)  equilibrium
B)  friction
C)  support force
D)  inertia

Question 3

When you stand at rest on a pair of bathroom scales, the reading on each scale

Accepted Answer

A)  is half your weight.
B)  equals your weight.
C)  add up to equal your weight.

Question 4

If you toss a coin straight upward while in a train moving at constant velocity, the coin will land

Accepted Answer

A)  as if you were at rest.
B)  in front of you.
C)  in back of you. A

Question 5

If you toss a coin straight upward in train that gains speed while the coin is in the air, the coin will land

Accepted Answer

A)  as if you were at rest.
B)  in front of you.
C)  in back of you.

Question 6

Galileo's interpretation of motion differed from Aristotle's in that Galileo emphasized

Accepted Answer

A)  the acceleration of free fall.
B)  rates of time.
C)  the role of distance in describing motion.
D)  none of the above

Question 7

Galileo taught us that if you roll a ball along a level surface it will

Accepted Answer

A)  soon slow down due to its natural place.
B)  keep rolling if friction is absent.
C)  roll as long as its inertia nudges it along.
D)  soon roll in the opposite direction.

Question 8

Inertia is defined as a

Accepted Answer

A)  force.
B)  property of matter.
C)  change in motion.
D)  none of the above

Question 9

When a pair of 10-N forces act on a box of candy, the net force on the box is

Accepted Answer

A)  zero.
B)  about 14 N.
C)  20 N.
D)  Any of the above depending on the directions of forces.

Question 10

A force is a vector quantity because it has both

Accepted Answer

A)  magnitude and direction.
B)  mass and velocity.
C)  action and reaction counterparts.
D)  speed and direction.

Question 11

Galileo's use of inclined planes allowed him to effectively

Accepted Answer

A)  slow down the ball's changes in speed.
B)  reduce the time of the ball's changes in speed.
C)  eliminate all changes in speed.
D)  eliminate friction.

Question 12

The support force on a 10-N book at rest on a table is

Accepted Answer

A)  slightly less than 10 N.
B)  10 N.
C)  slightly greater than 10 N.
D)  dependent on the position of the book. B

Question 13

A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is

Accepted Answer

A)  equal to its weight.
B)  equal to its weight divided by its mass.
C)  equal to its mass times its weight.
D)  none of the above

Question 14

The minimum number of forces that act on a book resting on a table is

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  none of the above

Question 15

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to

Accepted Answer

A)  follow a circular path.
B)  slow down.
C)  follow a straight-line path.
D)  stop.

Question 16

A pair of 10-N vectors at right angles to each other has a resultant of about

Accepted Answer

A)  10 N.
B)  14 N.
C)  20 N.
D)  none of the above

Question 17

A hockey puck sliding at constant velocity across the ice is

Accepted Answer

A)  in equilibrium.
B)  nearly in equilibrium.
C)  is nowhere near being in equilibrium.
D)  none of the above

Question 18

The equilibrium rule, ΣF = 0, applies to

Accepted Answer

A)  objects or systems at rest.
B)  objects or systems in uniform motion in a straight line.
C)  both of these
D)  neither of these

Question 19

Nellie hangs from a pair of ropes at an angle. Tension in the ropes depends on the

Accepted Answer

A)  length of the ropes.
B)  angle of the ropes.
C)  both of these
D)  neither of these

Question 20

When no forces act on moving objects their paths are normally

Accepted Answer

A)  straight lines.
B)  circles.
C)  ellipses.
D)  all of the above

Exam 2: Newtons First Law of Motion: Inertia

When Burl and Paul stand on opposite ends of a sign-painting scaffold, the tensions in the supporting ropes

Correct AnswerverifiedB

Which concept is being illustrated when a tablecloth is quickly yanked beneath dishes resting on a table?

Correct AnswerverifiedShow Answer

When you stand at rest on a pair of bathroom scales, the reading on each scale

Correct AnswerverifiedShow Answer

If you toss a coin straight upward while in a train moving at constant velocity, the coin will land

Correct AnswerverifiedA

If you toss a coin straight upward in train that gains speed while the coin is in the air, the coin will land

Correct AnswerverifiedShow Answer

Galileo's interpretation of motion differed from Aristotle's in that Galileo emphasized

Correct AnswerverifiedShow Answer

Galileo taught us that if you roll a ball along a level surface it will

Correct AnswerverifiedShow Answer

Inertia is defined as a

Correct AnswerverifiedShow Answer

When a pair of 10-N forces act on a box of candy, the net force on the box is

Correct AnswerverifiedShow Answer

A force is a vector quantity because it has both

Correct AnswerverifiedShow Answer

Galileo's use of inclined planes allowed him to effectively

Correct AnswerverifiedShow Answer

The support force on a 10-N book at rest on a table is

Correct AnswerverifiedB

A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is

Correct AnswerverifiedShow Answer

The minimum number of forces that act on a book resting on a table is

Correct AnswerverifiedShow Answer

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to

Correct AnswerverifiedShow Answer

A pair of 10-N vectors at right angles to each other has a resultant of about

Correct AnswerverifiedShow Answer

A hockey puck sliding at constant velocity across the ice is

Correct AnswerverifiedShow Answer

The equilibrium rule, ΣF = 0, applies to

Correct AnswerverifiedShow Answer

Nellie hangs from a pair of ropes at an angle. Tension in the ropes depends on the

Correct AnswerverifiedShow Answer

When no forces act on moving objects their paths are normally

Correct AnswerverifiedShow Answer

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B

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A

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B

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