Question 1

An airplane travels at constant speed for a distance of 120 km in a time of 15 min.Its speed is

Accepted Answer

A) 30 km/h. 
B) 120 km/in. 
C) 480 km/in. 
D) 1800 km/h. 
A) 30 km/h. 
B) 120 km/in. 
C) 480 km/in. 
D) 1800 km/h.

Question 2

In 6 min a person running at 10 km/h covers a distance of

Accepted Answer

A) 167 m. 
B) 600 m. 
C) 1000 m. 
D) 1667 m. 
A) 167 m. 
B) 600 m. 
C) 1000 m. 
D) 1667 m.

Question 3

A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s2 when its brakes are applied.In the first 6 s after the brakes are applied, the car travels

Accepted Answer

A) 150 m. 
B) 180 m. 
C) 210 m. 
D) 330 m. 
A) 150 m. 
B) 180 m. 
C) 210 m. 
D) 330 m.

Question 4

The weight of a 60-kg person is

Accepted Answer

A) 6.1 N. 
B) 60 N. 
C) 69.8 N. 
D) 588 N. 
A) 6.1 N. 
B) 60 N. 
C) 69.8 N. 
D) 588 N.

Question 5

A woman whose mass is 60 kg on the earth's surface is in a spacecraft at a height of 2 earth radii above the earth's surface.Her mass there is

Accepted Answer

A) 6.7 kg. 
B) 15 kg. 
C) 20 kg. 
D) 60 kg. 
A) 6.7 kg. 
B) 15 kg. 
C) 20 kg. 
D) 60 kg.

Question 6

The weight of an object

Accepted Answer

A) is the same everywhere in the universe. 
B) depends only upon its mass. 
C) depends only upon the acceleration of gravity. 
D) depends upon both its mass and the acceleration of gravity. 
A) is the same everywhere in the universe. 
B) depends only upon its mass. 
C) depends only upon the acceleration of gravity. 
D) depends upon both its mass and the acceleration of gravity.

Question 7

A car whose speed is a steady 50 km/h

Accepted Answer

A) cannot be accelerated. 
B) is accelerated when it climbs a hill. 
C) is accelerated when it descends a hill. 
D) is accelerated when it climbs a hill, goes over the crest, and descends on the other side. 
A) cannot be accelerated. 
B) is accelerated when it climbs a hill. 
C) is accelerated when it descends a hill. 
D) is accelerated when it climbs a hill, goes over the crest, and descends on the other side.

Question 8

Which one or more of the following pairs of displacements cannot be added to give a resultant displacement of 2 m?

Accepted Answer

A) 1 m and 1 m 
B) 1 m and 2 m 
C) 1 m and 3 m 
D) 1 m and 4 m 
A) 1 m and 1 m 
B) 1 m and 2 m 
C) 1 m and 3 m 
D) 1 m and 4 m

Question 9

A crane exerts an upward force of 600 N on a 50-kg crate.The crate's acceleration is

Accepted Answer

A) 0.82 m/s2. 
B) 2.2 m/s2. 
C) 11 m/s2. 
D) 12 m/s2. 
A) 0.82 m/s2. 
B) 2.2 m/s2. 
C) 11 m/s2. 
D) 12 m/s2.

Question 10

The speed of an object moving in a circle is doubled.The centripetal force needed is

Accepted Answer

A) one-quarter as much as before. 
B) half as much as before. 
C) twice as much as before. 
D) four times as much as before. 
A) one-quarter as much as before. 
B) half as much as before. 
C) twice as much as before. 
D) four times as much as before.

Question 11

The idea that all conclusions about the natural world must be based upon experiment and observation was first emphasized in the work of

Accepted Answer

A) Aristotle. 
B) St.Thomas Aquinas. 
C) Galileo. 
D) Newton. 
A) Aristotle. 
B) St.Thomas Aquinas. 
C) Galileo. 
D) Newton.

Question 12

A car starts from rest with a constant acceleration of 3 m/s2.In the first 4 s the car travels

Accepted Answer

A) 6 m. 
B) 18 m. 
C) 36 m. 
D) 72 m. 
A) 6 m. 
B) 18 m. 
C) 36 m. 
D) 72 m.

Question 13

A 500-g ball moves in a circle 40 cm in radius at a speed of 4 m/s.The centripetal force on the ball is

Accepted Answer

A) 10 N. 
B) 20 N. 
C) 40 N. 
D) 80 N. 
A) 10 N. 
B) 20 N. 
C) 40 N. 
D) 80 N.

Question 14

A certain force gives a 5-kg object an acceleration of 2.0 m/s2.The same force would give a 20-kg object an acceleration of

Accepted Answer

A) 0.5 m/s2. 
B) 2.0 m/s2. 
C) 4.9 m/s2. 
D) 8.0 m/s2. 
A) 0.5 m/s2. 
B) 2.0 m/s2. 
C) 4.9 m/s2. 
D) 8.0 m/s2.

Question 15

On a rainy day the maximum frictional force between a car's tires and a certain level road surface is reduced to half its usual value.The maximum safe speed for rounding a curve is

Accepted Answer

A) unchanged. 
B) reduced to 25% of its usual value. 
C) reduced to 50% of its usual value. 
D) reduced to 71% of its usual value. 
A) unchanged. 
B) reduced to 25% of its usual value. 
C) reduced to 50% of its usual value. 
D) reduced to 71% of its usual value.

Question 16

After a stone dropped from a cliff has fallen 20 m, the stone's speed is approximately

Accepted Answer

A) 10 m/s. 
B) 20 m/s. 
C) 196 m/s. 
D) 392 m/s. 
A) 10 m/s. 
B) 20 m/s. 
C) 196 m/s. 
D) 392 m/s.

Question 17

Which of the following units could be associated with a vector quantity?

Accepted Answer

A) km/s2 
B) kg/s 
C) hours 
D) m3 
A) km/s2 
B) kg/s 
C) hours 
D) m3

Question 18

The mass of a sack of potatoes whose weight is 200 N is

Accepted Answer

A) 20.4 kg. 
B) 91 kg. 
C) 210 kg. 
D) 440 kg. 
A) 20.4 kg. 
B) 91 kg. 
C) 210 kg. 
D) 440 kg.

Question 19

A jumper who weighs 600 N presses down on the ground with a force of 700 N and rises into the air as a result.The magnitude of the force the ground exerted on the jumper was

Accepted Answer

A) 100 N. 
B) 600 N. 
C) 700 N. 
D) 1300 N. 
A) 100 N. 
B) 600 N. 
C) 700 N. 
D) 1300 N.

Question 20

A boat whose velocity through the water is 20 km/h is moving in a river whose current is 6 km/in relative to the riverbed.The velocity of the boat relative to the riverbed must be between

Accepted Answer

A) 6 and 20 km/h. 
B) 6 and 26 km/h. 
C) 12 and 20 km/h. 
D) 12 and 26 km/h. 
A) 6 and 20 km/h. 
B) 6 and 26 km/h. 
C) 12 and 20 km/h. 
D) 12 and 26 km/h.

An airplane travels at constant speed for a distance of 120 km in a time of 15 min.Its speed is

In 6 min a person running at 10 km/h covers a distance of

A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s² when its brakes are applied.In the first 6 s after the brakes are applied, the car travels

The weight of a 60-kg person is

A woman whose mass is 60 kg on the earth's surface is in a spacecraft at a height of 2 earth radii above the earth's surface.Her mass there is

The weight of an object

A car whose speed is a steady 50 km/h

Which one or more of the following pairs of displacements cannot be added to give a resultant displacement of 2 m?

A crane exerts an upward force of 600 N on a 50-kg crate.The crate's acceleration is

The speed of an object moving in a circle is doubled.The centripetal force needed is

The idea that all conclusions about the natural world must be based upon experiment and observation was first emphasized in the work of

A car starts from rest with a constant acceleration of 3 m/s².In the first 4 s the car travels

A 500-g ball moves in a circle 40 cm in radius at a speed of 4 m/s.The centripetal force on the ball is

A certain force gives a 5-kg object an acceleration of 2.0 m/s².The same force would give a 20-kg object an acceleration of

On a rainy day the maximum frictional force between a car's tires and a certain level road surface is reduced to half its usual value.The maximum safe speed for rounding a curve is

After a stone dropped from a cliff has fallen 20 m, the stone's speed is approximately

Which of the following units could be associated with a vector quantity?

The mass of a sack of potatoes whose weight is 200 N is

A jumper who weighs 600 N presses down on the ground with a force of 700 N and rises into the air as a result.The magnitude of the force the ground exerted on the jumper was

A boat whose velocity through the water is 20 km/h is moving in a river whose current is 6 km/in relative to the riverbed.The velocity of the boat relative to the riverbed must be between

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Exam 2: Motion

An airplane travels at constant speed for a distance of 120 km in a time of 15 min.Its speed is

In 6 min a person running at 10 km/h covers a distance of

A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s2 when its brakes are applied.In the first 6 s after the brakes are applied, the car travels

The weight of a 60-kg person is

A woman whose mass is 60 kg on the earth's surface is in a spacecraft at a height of 2 earth radii above the earth's surface.Her mass there is

The weight of an object

A car whose speed is a steady 50 km/h

Which one or more of the following pairs of displacements cannot be added to give a resultant displacement of 2 m?

A crane exerts an upward force of 600 N on a 50-kg crate.The crate's acceleration is

The speed of an object moving in a circle is doubled.The centripetal force needed is

The idea that all conclusions about the natural world must be based upon experiment and observation was first emphasized in the work of

A car starts from rest with a constant acceleration of 3 m/s2.In the first 4 s the car travels

A 500-g ball moves in a circle 40 cm in radius at a speed of 4 m/s.The centripetal force on the ball is

A certain force gives a 5-kg object an acceleration of 2.0 m/s2.The same force would give a 20-kg object an acceleration of

On a rainy day the maximum frictional force between a car's tires and a certain level road surface is reduced to half its usual value.The maximum safe speed for rounding a curve is

After a stone dropped from a cliff has fallen 20 m, the stone's speed is approximately

Which of the following units could be associated with a vector quantity?

The mass of a sack of potatoes whose weight is 200 N is

A jumper who weighs 600 N presses down on the ground with a force of 700 N and rises into the air as a result.The magnitude of the force the ground exerted on the jumper was

A boat whose velocity through the water is 20 km/h is moving in a river whose current is 6 km/in relative to the riverbed.The velocity of the boat relative to the riverbed must be between

The Scientific Method

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s² when its brakes are applied.In the first 6 s after the brakes are applied, the car travels

A car starts from rest with a constant acceleration of 3 m/s².In the first 4 s the car travels

A certain force gives a 5-kg object an acceleration of 2.0 m/s².The same force would give a 20-kg object an acceleration of