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Chapter 2. Newton’s First Law of Motion—Inertia. Aristotle and his followers for many centuries thought Earth was at rest at the center of the universe because. a. humans experience no sensation of a moving Earth. b. Earth rotates about its axis. c. Earth moves in a perfect circle.

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Chapter 2

Chapter 2

Newton’s First Law of Motion—Inertia


Aristotle and his followers for many centuries thought Earth was at rest at the center of the universe because

a. humans experience no sensation of a moving Earth.

b. Earth rotates about its axis.

c. Earth moves in a perfect circle.

d. Earth moves in an elliptical path about the Sun.


Aristotle and his followers for many centuries thought Earth was at rest at the center of the universe because

a. humans experience no sensation of a moving Earth.

b. Earth rotates about its axis.

c. Earth moves in a perfect circle.

d. Earth moves in an elliptical path about the Sun.


Science greatly advanced when galileo favored
Science greatly advanced when Galileo favored was at rest at the center of the universe because

a. philosophical discussions over experiment.

b. experiment over philosophical discussions.

c. nonmathematical thinking.

d. None of these.


Science greatly advanced when galileo favored1
Science greatly advanced when Galileo favored was at rest at the center of the universe because

a. philosophical discussions over experiment.

b. experiment over philosophical discussions.

c. nonmathematical thinking.

d. None of these.


Galileo said that if you rolled a ball along a level surface it would
Galileo said that if you rolled a ball along a level surface it would

a. soon slow down due to its natural tendency to come to rest.

b. keep rolling without slowing if no friction acted upon it.

c. roll as long as its inertia nudged it along.

d. soon roll in the opposite direction.


Galileo said that if you rolled a ball along a level surface it would1
Galileo said that if you rolled a ball along a level surface it would

a. soon slow down due to its natural tendency to come to rest.

b. keep rolling without slowing if no friction acted upon it.

c. roll as long as its inertia nudged it along.

d. soon roll in the opposite direction.


When Galileo rolled a ball down one incline so that at the bottom it rolled up another, he found that the ball rolled

a. almost to its initial height.

b. halfway to its original height.

c. to its original height.

d. higher than its original height.


When Galileo rolled a ball down one incline so that at the bottom it rolled up another, he found that the ball rolled

a. almost to its initial height.

b. halfway to its original height.

c. to its original height.

d. higher than its original height.


According to galileo inertia is a
According to Galileo, inertia is a bottom it rolled up another, he found that the ball rolled

a. force like any other force.

b. special kind of force.

c. property of all matter.

d. concept opposite to force.


According to galileo inertia is a1
According to Galileo, inertia is a bottom it rolled up another, he found that the ball rolled

a. force like any other force.

b. special kind of force.

c. property of all matter.

d. concept opposite to force.


Which of these is not a vector quantity
Which of these is NOT a vector quantity? bottom it rolled up another, he found that the ball rolled

a. Speed

b. Velocity

c. Force

d. All are vector quantities.


Which of these is not a vector quantity1
Which of these is NOT a vector quantity? bottom it rolled up another, he found that the ball rolled

a. Speed

b. Velocity

c. Force

d. All are vector quantities.


When dishes remain on a table when you yank away a tablecloth you re illustrating
When dishes remain on a table when you yank away a tablecloth, you’re illustrating

a. friction.

b. inertia.

c. constant motion.

d.SF= 0.


When dishes remain on a table when you yank away a tablecloth you re illustrating1
When dishes remain on a table when you yank away a tablecloth, you’re illustrating

a. friction.

b. inertia.

c. constant motion.

d.SF= 0.


If gravity between the sun and earth suddenly vanished earth would continue moving in
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in

a. a curved path.

b. an outward spiral path.

c. an inward spiral path.

d. a straight-line path.


If gravity between the sun and earth suddenly vanished earth would continue moving in1
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in

a. a curved path.

b. an outward spiral path.

c. an inward spiral path.

d. a straight-line path.


A space probe in remote outer space continues moving
A space probe in remote outer space continues moving Earth would continue moving in

a. because some kind of force acts on it.

b. in a curved path.

c. even though no force acts on it.

d. due to gravity.


A space probe in remote outer space continues moving1
A space probe in remote outer space continues moving Earth would continue moving in

a. because some kind of force acts on it.

b. in a curved path.

c. even though no force acts on it.

d. due to gravity.


Consider a ball resting in the middle of a cart when you quickly jerk the cart forward the ball
Consider a ball resting in the middle of a cart. When you quickly jerk the cart forward, the ball

a. hits the front of the cart.

b. hits the back of the cart.

c. remains in the middle of the cart.

d. All of these are possible, depending on how quickly the cart is pulled.


Consider a ball resting in the middle of a cart when you quickly jerk the cart forward the ball1
Consider a ball resting in the middle of a cart. When you quickly jerk the cart forward, the ball

a. hits the front of the cart.

b. hits the back of the cart.

c. remains in the middle of the cart.

d. All of these are possible, depending on how quickly the cart is pulled.

Explanation: The ball tends to remain at rest, and the back of the cart intercepts it, so the back of the cart and the ball hit each other.


A girl pushes a cart to the left with a 100-N force. A boy pushes it to the right with a 50-N force. The net force exerted by the girl and the boy is

a. 100 N to the left.

b. 100 N to the right.

c. 50 N to the left.

d. 50 N to the right.


A girl pushes a cart to the left with a 100-N force. A boy pushes it to the right with a 50-N force. The net force exerted by the girl and the boy is

a. 100 N to the left.

b. 100 N to the right.

c. 50 N to the left.

d. 50 N to the right.


When a 10-kg block is simultaneously pushed eastward with a force of 20 N and westward with 15 N, the combination of these forces on the block is

a. 35 N west.

b. 35 N east.

c. 5 N east.

d. 5 N west.


When a 10-kg block is simultaneously pushed eastward with a force of 20 N and westward with 15 N, the combination of these forces on the block is

a. 35 N west.

b. 35 N east.

c. 5 N east.

d. 5 N west.


When a 10 n object is suspended at rest by two vertical strands of rope the tension in each rope is
When a 10-N object is suspended at rest by two vertical strands of rope, the tension in each rope is

a. slightly less than 5 N.

b. 5 N.

c. slightly more than 5 N.

d. 10 N.


When a 10 n object is suspended at rest by two vertical strands of rope the tension in each rope is1
When a 10-N object is suspended at rest by two vertical strands of rope, the tension in each rope is

a. slightly less than 5 N.

b. 5 N.

c. slightly more than 5 N.

d. 10 N.


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

a. are equal.

b. depend on the relative weights of Burl and Paul.

c. combine to equal zero.

d. are in equilibrium.


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

a. are equal.

b. depend on the relative weights of Burl and Paul.

c. combine to equal zero.

d. are in equilibrium.

Explanation: If they have equal weights, then tensions in both ropes would be the same. If Burl is heavier than Paul, then more weight is supported by Burl’s rope and tension in it is greater.


If Burl carried Paul piggy-back while standing in the scaffold, the tensions in the two supporting ropesmiddle of a scaffold, the tensions in the two supporting ropes would

a. cancel to zero.

b. be equal.

c. be unequal.

d. more easily support Burl and Paul.


If Burl carried Paul piggy-back while standing in the scaffold, the tensions in the two supporting ropesmiddle of a scaffold, the tensions in the two supporting ropes would

a. cancel to zero.

b. be equal.

c. be unequal.

d. more easily support Burl and Paul.


Burl and Paul have a total weight of 1300 N. The tensions in the ropes that support the scaffold they stand on add to 1700 N. The weight of the scaffold itself must be

a. 400 N.

b. 500 N.

c. 600 N.

d. 800 N.


Burl and Paul have a total weight of 1300 N. The tensions in the ropes that support the scaffold they stand on add to 1700 N. The weight of the scaffold itself must be

a. 400 N.

b. 500 N.

c. 600 N.

d. 800 N.


Place a book that weighs 10 n on a table and the support force on the book is
Place a book that weighs 10 N on a table and the support force on the book is

a. slightly less than 10 N.

b. 10 N.

c. slightly greater than 10 N.

d. dependent on whether the book is flat or stands upright.


Place a book that weighs 10 n on a table and the support force on the book is1
Place a book that weighs 10 N on a table and the support force on the book is

a. slightly less than 10 N.

b. 10 N.

c. slightly greater than 10 N.

d. dependent on whether the book is flat or stands upright.


The equilibrium rule s f 0 applies to
The equilibrium rule, force on the book isSF = 0, applies to

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.


The equilibrium rule s f 0 applies to1
The equilibrium rule, force on the book isSF = 0, applies to

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.


The net force on any object in equilibrium is
The net force on any object in equilibrium is force on the book is

a. zero.

b. 10 meters per second squared.

c. equal to its weight.

d. somewhat less than its weight.


The net force on any object in equilibrium is1
The net force on any object in equilibrium is force on the book is

a. zero.

b. 10 meters per second squared.

c. equal to its weight.

d. somewhat less than its weight.


Earth moves about 30 km/s relative to the Sun. When you jump upward in front of a wall, the wall doesn’t slam into you at 30 km/s. This is because the wall

a. has too little gravity to influence you.

b. moves in an opposite direction to you.

c. and you are moving at the same horizontal speed before, during, and after your jump.

d. has negligible inertia compared with the Sun.


Earth moves about 30 km/s relative to the Sun. When you jump upward in front of a wall, the wall doesn’t slam into you at 30 km/s. This is because the wall

a. has too little gravity to influence you.

b. moves in an opposite direction to you.

c. and you are moving at the same horizontal speed before, during, and after your jump.

d. has negligible inertia compared with the Sun.


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