Question 1

A wheel falls off an airplane and takes 8 s to reach the ground.If there were no air resistance, the wheel's final speed would be

Accepted Answer

A) 9.8 m/s. 
B) 39 m/s. 
C) 78 m/s. 
D) 314 m/s. 
A) 9.8 m/s. 
B) 39 m/s. 
C) 78 m/s. 
D) 314 m/s.

Question 2

A car whose mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s2.If three 80-kg passengers are also in the car, its maximum acceleration will be

Accepted Answer

A) 0.5 m/s2. 
B) 0.72 m/s2. 
C) 1.04 m/s2. 
D) 1.2 m/s2. 
A) 0.5 m/s2. 
B) 0.72 m/s2. 
C) 1.04 m/s2. 
D) 1.2 m/s2.

Question 3

A car starts from rest with a constant acceleration of 5 m/s2.How much time does the car take to cover the first 160 m?

Accepted Answer

A) 8 s 
B) 16 s 
C) 32 s 
D) 64 s 
A) 8 s 
B) 16 s 
C) 32 s 
D) 64 s

Question 4

Which of the following statements is incorrect?

Accepted Answer

A) All vector quantities have directions. 
B) All vector quantities have magnitudes. 
C) All scalar quantities have directions. 
D) All scalar quantities have magnitudes. 
A) All vector quantities have directions. 
B) All vector quantities have magnitudes. 
C) All scalar quantities have directions. 
D) All scalar quantities have magnitudes.

Question 5

According to Newton's third law of motion,

Accepted Answer

A) there is no such thing as a single force acting on an object. 
B) for every force there is an equal and opposite reaction force, but each acts on a different object. 
C) action and reaction forces need not be equal, but must act in opposite directions. 
D) action and reaction forces must be equal, but need not act in opposite directions. 
A) there is no such thing as a single force acting on an object. 
B) for every force there is an equal and opposite reaction force, but each acts on a different object. 
C) action and reaction forces need not be equal, but must act in opposite directions. 
D) action and reaction forces must be equal, but need not act in opposite directions.

Question 6

A hole is drilled to the center of the earth and a ball is dropped into it.When the ball is at the earth's center, compared with their respective values at the earth's surface,

Accepted Answer

A) its mass and weight are the same. 
B) its mass and weight are both 0. 
C) its mass is the same and its weight is 0. 
D) its weight is the same and its mass is 0. 
A) its mass and weight are the same. 
B) its mass and weight are both 0. 
C) its mass is the same and its weight is 0. 
D) its weight is the same and its mass is 0.

Question 7

An object is moving in a circle with a constant speed.Its acceleration is constant in

Accepted Answer

A) magnitude only. 
B) direction only. 
C) both magnitude and direction. 
D) neither magnitude nor direction. 
A) magnitude only. 
B) direction only. 
C) both magnitude and direction. 
D) neither magnitude nor direction.

Question 8

The mass of a 2000-lb elephant is

Accepted Answer

A) 204 kg. 
B) 909 kg. 
C) 449 kg. 
D) 19,600 kg. 
A) 204 kg. 
B) 909 kg. 
C) 449 kg. 
D) 19,600 kg.

Question 9

A car starts from a speed of 10 m/s with an acceleration of 2 m/s2.The time needed for the car to reach 30 m/s is

Accepted Answer

A) 10 s. 
B) 20 s. 
C) 30 s. 
D) 40 s. 
A) 10 s. 
B) 20 s. 
C) 30 s. 
D) 40 s.

Question 10

A 430-g soccer ball lying on the ground is kicked with a force of 800 N.If the kick lasts 0.01 s, the ball flies off with a speed of

Accepted Answer

A) 0.0186 m/s. 
B) 0.182 m/s. 
C) 1.90 m/s. 
D) 18.6 m/s. 
A) 0.0186 m/s. 
B) 0.182 m/s. 
C) 1.90 m/s. 
D) 18.6 m/s.

Question 11

A car whose initial speed is 30 m/s undergoes a constant acceleration of 5 m/s2.In the first 6 s after the acceleration starts, the car travels

Accepted Answer

A) 90 m. 
B) 120 m. 
C) 195 m. 
D) 270 m. 
A) 90 m. 
B) 120 m. 
C) 195 m. 
D) 270 m.

Question 12

Which of the following sets of displacements might be able to return a car to its starting point?

Accepted Answer

A) 2, 8, 10, and 25 km 
B) 5, 20, 35, and 65 km 
C) 60, 120, 180, and 240 km 
D) 100, 100, 100, and 400 km 
A) 2, 8, 10, and 25 km 
B) 5, 20, 35, and 65 km 
C) 60, 120, 180, and 240 km 
D) 100, 100, 100, and 400 km

Question 13

The length C of the longest side of a right triangle is related to the lengths A and B of the other sides by the formula

Accepted Answer

A) C = A + B. 
B) C = A2 + B2. 
C)    . 
D)    . 
A) C = A + B. 
B) C = A2 + B2. 
C)    . 
D)    .

Question 14

The braking force needed to bring a 4000-kg truck to a stop from a speed of 20 m/s in 5 s is

Accepted Answer

A) 1000 N. 
B) 1633 N. 
C) 9800 N. 
D) 16,000 N. 
A) 1000 N. 
B) 1633 N. 
C) 9800 N. 
D) 16,000 N.

Question 15

A ship travels 20 km to the south and then 40 km to the west.The ship's displacement from its starting point is

Accepted Answer

A) 20 km. 
B) 40 km. 
C) 45 km. 
D) 60 km. 
A) 20 km. 
B) 40 km. 
C) 45 km. 
D) 60 km.

Question 16

A car that starts from rest with a constant acceleration travels 50 m in the first 5 s.The car's acceleration is

Accepted Answer

A) 2 m/s2. 
B) 4 m/s2. 
C) 10 m/s2. 
D) 20 m/s2. 
A) 2 m/s2. 
B) 4 m/s2. 
C) 10 m/s2. 
D) 20 m/s2.

Question 17

A ball of mass 200 g is whirled in a circle at the end of a string 100 cm long whose breaking strength is 10 N.Neglecting gravity, the maximum speed of the ball is approximately

Accepted Answer

A) 2 m/s. 
B) 7 m/s. 
C) 10 m/s. 
D) 50 m/s. 
A) 2 m/s. 
B) 7 m/s. 
C) 10 m/s. 
D) 50 m/s.

Question 18

A ball is thrown upward with a speed of 30 m/s.About how long after it was thrown will the ball reach the ground?

Accepted Answer

A) 1.5 s 
B) 3.1 s 
C) 6.1 s 
D) 12.2 s 
A) 1.5 s 
B) 3.1 s 
C) 6.1 s 
D) 12.2 s

Question 19

The time needed for a car whose speed is 60 km/h to travel 800 m is

Accepted Answer

A) 0.48 min. 
B) 0.8 min. 
C) 4.5 min. 
D) 13 min. 
A) 0.48 min. 
B) 0.8 min. 
C) 4.5 min. 
D) 13 min.

Question 20

A force gives a 100-kg mass an acceleration of 2 m/s2.The same force would give a mass of 1000 kg an acceleration of

Accepted Answer

A) 0.2 m/s2. 
B) 2 m/s2. 
C) 20 m/s2. 
D) 200 m/s2. 
A) 0.2 m/s2. 
B) 2 m/s2. 
C) 20 m/s2. 
D) 200 m/s2.

A wheel falls off an airplane and takes 8 s to reach the ground.If there were no air resistance, the wheel's final speed would be

A car whose mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s².If three 80-kg passengers are also in the car, its maximum acceleration will be

A car starts from rest with a constant acceleration of 5 m/s².How much time does the car take to cover the first 160 m?

Which of the following statements is incorrect?

According to Newton's third law of motion,

A hole is drilled to the center of the earth and a ball is dropped into it.When the ball is at the earth's center, compared with their respective values at the earth's surface,

An object is moving in a circle with a constant speed.Its acceleration is constant in

The mass of a 2000-lb elephant is

A car starts from a speed of 10 m/s with an acceleration of 2 m/s².The time needed for the car to reach 30 m/s is

A 430-g soccer ball lying on the ground is kicked with a force of 800 N.If the kick lasts 0.01 s, the ball flies off with a speed of

A car whose initial speed is 30 m/s undergoes a constant acceleration of 5 m/s².In the first 6 s after the acceleration starts, the car travels

Which of the following sets of displacements might be able to return a car to its starting point?

The length C of the longest side of a right triangle is related to the lengths A and B of the other sides by the formula

The braking force needed to bring a 4000-kg truck to a stop from a speed of 20 m/s in 5 s is

A ship travels 20 km to the south and then 40 km to the west.The ship's displacement from its starting point is

A car that starts from rest with a constant acceleration travels 50 m in the first 5 s.The car's acceleration is

A ball of mass 200 g is whirled in a circle at the end of a string 100 cm long whose breaking strength is 10 N.Neglecting gravity, the maximum speed of the ball is approximately

A ball is thrown upward with a speed of 30 m/s.About how long after it was thrown will the ball reach the ground?

The time needed for a car whose speed is 60 km/h to travel 800 m is

A force gives a 100-kg mass an acceleration of 2 m/s².The same force would give a mass of 1000 kg an acceleration of

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Exam 2: Motion

A wheel falls off an airplane and takes 8 s to reach the ground.If there were no air resistance, the wheel's final speed would be

A car whose mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s2.If three 80-kg passengers are also in the car, its maximum acceleration will be

A car starts from rest with a constant acceleration of 5 m/s2.How much time does the car take to cover the first 160 m?

Which of the following statements is incorrect?

According to Newton's third law of motion,

A hole is drilled to the center of the earth and a ball is dropped into it.When the ball is at the earth's center, compared with their respective values at the earth's surface,

An object is moving in a circle with a constant speed.Its acceleration is constant in

The mass of a 2000-lb elephant is

A car starts from a speed of 10 m/s with an acceleration of 2 m/s2.The time needed for the car to reach 30 m/s is

A 430-g soccer ball lying on the ground is kicked with a force of 800 N.If the kick lasts 0.01 s, the ball flies off with a speed of

A car whose initial speed is 30 m/s undergoes a constant acceleration of 5 m/s2.In the first 6 s after the acceleration starts, the car travels

Which of the following sets of displacements might be able to return a car to its starting point?

The length C of the longest side of a right triangle is related to the lengths A and B of the other sides by the formula

The braking force needed to bring a 4000-kg truck to a stop from a speed of 20 m/s in 5 s is

A ship travels 20 km to the south and then 40 km to the west.The ship's displacement from its starting point is

A car that starts from rest with a constant acceleration travels 50 m in the first 5 s.The car's acceleration is

A ball of mass 200 g is whirled in a circle at the end of a string 100 cm long whose breaking strength is 10 N.Neglecting gravity, the maximum speed of the ball is approximately

A ball is thrown upward with a speed of 30 m/s.About how long after it was thrown will the ball reach the ground?

The time needed for a car whose speed is 60 km/h to travel 800 m is

A force gives a 100-kg mass an acceleration of 2 m/s2.The same force would give a mass of 1000 kg an acceleration of

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 mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s².If three 80-kg passengers are also in the car, its maximum acceleration will be

A car starts from rest with a constant acceleration of 5 m/s².How much time does the car take to cover the first 160 m?

A car starts from a speed of 10 m/s with an acceleration of 2 m/s².The time needed for the car to reach 30 m/s is

A car whose initial speed is 30 m/s undergoes a constant acceleration of 5 m/s².In the first 6 s after the acceleration starts, the car travels

A force gives a 100-kg mass an acceleration of 2 m/s².The same force would give a mass of 1000 kg an acceleration of