Question 1

Jason weighs 150 N and sits on his big brother's shoulders. Big brother weighs 400 N. The support force supplied by the floor must be

Accepted Answer

A) 150 N. 
B) 400 N. 
C) 550 N. 
D) more than 550 N. 
A) 150 N. 
B) 400 N. 
C) 550 N. 
D) more than 550 N.

Question 2

A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity. When the glue gives way, the stone falls and hits the floor

Accepted Answer

A) ahead of the midpoint of the ceiling. 
B) exactly below the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) none of the above 
A) ahead of the midpoint of the ceiling. 
B) exactly below the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) none of the above

Question 3

When Nellie Newton hangs by the ends of a rope draped over a large pulley, the tension in each supporting vertical strand is

Accepted Answer

A) half her weight. 
B) equal to her weight. 
C) twice her weight. 
D) none of the above 
A) half her weight. 
B) equal to her weight. 
C) twice her weight. 
D) none of the above

Question 4

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

Accepted Answer

A) cancel to zero. 
B) be equal. 
C) be in dynamic equilibrium. 
D) more easily support Burl and Paul. 
A) cancel to zero. 
B) be equal. 
C) be in dynamic equilibrium. 
D) more easily support Burl and Paul.

Question 5

A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground. This faulty reasoning is best countered with Newton's

Accepted Answer

A) law of inertia. 
B) law of gravity. 
C) laws of motion. 
D) none of the above 
A) law of inertia. 
B) law of gravity. 
C) laws of motion. 
D) none of the above

Question 6

Science later greatly advanced when Galileo favored

Accepted Answer

A) philosophical discussions over experiment. 
B) experiment over philosophical discussions. 
C) nonmathematical thinking. 
D) none of the above 
A) philosophical discussions over experiment. 
B) experiment over philosophical discussions. 
C) nonmathematical thinking. 
D) none of the above

Question 7

If no external forces act on a moving object, it will

Accepted Answer

A) continue moving at the same speed. 
B) move slower and slower until it finally stops. 
C) come to an abrupt halt. 
D) none of the above 
A) continue moving at the same speed. 
B) move slower and slower until it finally stops. 
C) come to an abrupt halt. 
D) none of the above

Question 8

The equilibrium rule applies to

Accepted Answer

A) vector quantities. 
B) quantities that are equal in magnitude. 
C) scalar quantities. 
D) any kind of quantities. 
A) vector quantities. 
B) quantities that are equal in magnitude. 
C) scalar quantities. 
D) any kind of quantities.

Question 9

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

Accepted Answer

A) 300 N. 
B) 400 N. 
C) 500 N. 
D) 600 N. 
A) 300 N. 
B) 400 N. 
C) 500 N. 
D) 600 N.

Question 10

A hockey puck sliding across the ice finally comes to rest because

Accepted Answer

A) it seeks its proper and natural state. 
B) of friction. 
C) that's just the way it is. 
A) it seeks its proper and natural state. 
B) of friction. 
C) that's just the way it is.

Question 11

When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when

Accepted Answer

A) the lengths of rope on each side are different. 
B) the angles at each side of the rope are unequal. 
C) she is in equilibrium. 
D) none of the above 
A) the lengths of rope on each side are different. 
B) the angles at each side of the rope are unequal. 
C) she is in equilibrium. 
D) none of the above

Question 12

Earth continually moves about 30 km/s through space, which means the wall you stand next to also is moving at 30 km/s. When you jump vertically the wall doesn't slam into you because

Accepted Answer

A) the speeds of you and Earth cancel out. 
B) you're moving horizontally just as fast as the wall. 
C) your upward motion is small compared with Earth's speed. 
D) motion of the Sun counteracts your motion. 
A) the speeds of you and Earth cancel out. 
B) you're moving horizontally just as fast as the wall. 
C) your upward motion is small compared with Earth's speed. 
D) motion of the Sun counteracts your motion.

Question 13

If Nellie hangs from a horizontal bar that is supported by four vertical ropes, the tension in the ropes

Accepted Answer

A) are each half her weight. 
B) are each equal to her weight. 
C) add to equal her weight. 
D) none of the above 
A) are each half her weight. 
B) are each equal to her weight. 
C) add to equal her weight. 
D) none of the above

Question 14

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

Accepted Answer

A) more than 10 N. 
B) less than 10 N. 
C) 10 N. 
A) more than 10 N. 
B) less than 10 N. 
C) 10 N.

Question 15

Burl and Paul paint signs together on a scaffold. Compared to their weights plus the weight of the scaffold, the sum of tensions in the supporting ropes is

Accepted Answer

A) less. 
B) the same. 
C) greater. 
D) zero. 
A) less. 
B) the same. 
C) greater. 
D) zero.

Question 16

Which of the following is a vector quantity?

Accepted Answer

A) area 
B) volume 
C) mass 
D) none of the above 
A) area 
B) volume 
C) mass 
D) none of the above

Question 17

A tree stump is pulled northward by a 10-N force at the same time a 25-N force pulls it southward. The resultant force has a magnitude of

Accepted Answer

A) 0 N. 
B) 15 N. 
C) 25 N. 
D) 150 N. 
A) 0 N. 
B) 15 N. 
C) 25 N. 
D) 150 N.

Question 18

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its engine is turned off. This is not observed because railroad trains

Accepted Answer

A) aren't massive enough. 
B) are too heavy. 
C) ride on straight tracks. 
D) encounter opposing forces. 
A) aren't massive enough. 
B) are too heavy. 
C) ride on straight tracks. 
D) encounter opposing forces.

Question 19

The resultant of a 40-N force at right angles to a 30-N force is

Accepted Answer

A) 30 N. 
B) 40 N. 
C) 50 N. 
D) greater than 50 N. 
A) 30 N. 
B) 40 N. 
C) 50 N. 
D) greater than 50 N.

Question 20

Two students engaged in a tug-of-war each pull a rope in opposite directions with a force of 400 N. The net force on the rope is

Accepted Answer

A) zero and rope tension is 400 N. 
B) zero and rope tension is 800 N. 
C) 400 N and rope tension is 800 N. 
D) 400 N and rope tension is also 400 N. 
A) zero and rope tension is 400 N. 
B) zero and rope tension is 800 N. 
C) 400 N and rope tension is 800 N. 
D) 400 N and rope tension is also 400 N.

Exam 2: Newtons First Law of Motion: Inertia

Jason weighs 150 N and sits on his big brother's shoulders. Big brother weighs 400 N. The support force supplied by the floor must be

A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity. When the glue gives way, the stone falls and hits the floor

When Nellie Newton hangs by the ends of a rope draped over a large pulley, the tension in each supporting vertical strand is

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

A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground. This faulty reasoning is best countered with Newton's

Science later greatly advanced when Galileo favored

If no external forces act on a moving object, it will

The equilibrium rule applies to

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

A hockey puck sliding across the ice finally comes to rest because

When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when

Earth continually moves about 30 km/s through space, which means the wall you stand next to also is moving at 30 km/s. When you jump vertically the wall doesn't slam into you because

If Nellie hangs from a horizontal bar that is supported by four vertical ropes, the tension in the ropes

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

Burl and Paul paint signs together on a scaffold. Compared to their weights plus the weight of the scaffold, the sum of tensions in the supporting ropes is

Which of the following is a vector quantity?

A tree stump is pulled northward by a 10-N force at the same time a 25-N force pulls it southward. The resultant force has a magnitude of

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its engine is turned off. This is not observed because railroad trains

The resultant of a 40-N force at right angles to a 30-N force is

Two students engaged in a tug-of-war each pull a rope in opposite directions with a force of 400 N. The net force on the rope is

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