Question 1

A ball of mass 2.0 kg is acted on by two forces,   and   .The magnitude of the acceleration is

Accepted Answer

A) 2.5 m/s2 
B) 3.9 m/s2 
C) 4.6 m/s2 
D) 5.1 m/s2 
E) 5.8 m/s2 
A) 2.5 m/s2 
B) 3.9 m/s2 
C) 4.6 m/s2 
D) 5.1 m/s2 
E) 5.8 m/s2

Question 2

A mass m is traveling at an initial speed v0 = 25.0 m/s.It is brought to rest in a distance of 62.5 m by a force of 15.0 N.The mass is

Accepted Answer

A) 37.5 kg 
B) 3.00 kg 
C) 1.50 kg 
D) 6.00 kg 
E) 3.75 kg 
A) 37.5 kg 
B) 3.00 kg 
C) 1.50 kg 
D) 6.00 kg 
E) 3.75 kg

Question 3

A boy holds a bird in his hand.The reaction force to the normal force exerted on the bird by the boy's hand is the force of:

Accepted Answer

A) the Earth on the bird. 
B) the bird on the Earth. 
C) the hand on the bird. 
D) the bird on the hand. 
E) the Earth on the hand. 
A) the Earth on the bird. 
B) the bird on the Earth. 
C) the hand on the bird. 
D) the bird on the hand. 
E) the Earth on the hand.

Question 4

Rachel has been reading her physics book.She takes her weighing scales into an elevator and stands on them.If her normal weight is 690 N (155 lbs),and the elevator moves upward at 0.25g and then down at 0.25g,what is the difference between the up and down scale readings?

Accepted Answer

A) 690 N 
B) 520 N 
C) 170 N 
D) 345 N 
E) 1.04 $\times$ 103 N 
A) 690 N 
B) 520 N 
C) 170 N 
D) 345 N 
E) 1.04 $\times$ 103 N

Question 5

A bell hangs from a blue rope.A red rope attached to the side of the bell is pulled in the horizontal direction.This causes the blue rope to make an angle less than 90º with the vertical.Which of the following statements is true?

Accepted Answer

A) The red rope is under greater tension than the blue rope. 
B) The red rope is under the same tension as the blue rope. 
C) The blue rope is under greater tension than the red rope. 
D) The tensions cannot be compared unless the mass of the bell is known. 
E) The tensions cannot be compared unless the angle that the blue rope makes with the vertical is known. 
A) The red rope is under greater tension than the blue rope. 
B) The red rope is under the same tension as the blue rope. 
C) The blue rope is under greater tension than the red rope. 
D) The tensions cannot be compared unless the mass of the bell is known. 
E) The tensions cannot be compared unless the angle that the blue rope makes with the vertical is known.

Question 6

In a crash test the strapped-in,75-kg dummy moves a distance of 0.80 m when the test car is slammed straight into a wall at 11.2 m/s (~25 mph).The average force acting on the dummy during the collision is how many times his own weight?

Accepted Answer

A) 0.13 
B) 78 
C) 0.71 
D) 8.0 
E) 4.0 
A) 0.13 
B) 78 
C) 0.71 
D) 8.0 
E) 4.0

Exam 4: Newtons Laws

A ball of mass 2.0 kg is acted on by two forces, and .The magnitude of the acceleration is

A mass m is traveling at an initial speed v0 = 25.0 m/s.It is brought to rest in a distance of 62.5 m by a force of 15.0 N.The mass is

A boy holds a bird in his hand.The reaction force to the normal force exerted on the bird by the boy's hand is the force of:

Rachel has been reading her physics book.She takes her weighing scales into an elevator and stands on them.If her normal weight is 690 N (155 lbs),and the elevator moves upward at 0.25g and then down at 0.25g,what is the difference between the up and down scale readings?

A bell hangs from a blue rope.A red rope attached to the side of the bell is pulled in the horizontal direction.This causes the blue rope to make an angle less than 90º with the vertical.Which of the following statements is true?

In a crash test the strapped-in,75-kg dummy moves a distance of 0.80 m when the test car is slammed straight into a wall at 11.2 m/s (~25 mph).The average force acting on the dummy during the collision is how many times his own weight?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

The Electric Field I: Discrete Charge Distributions

The Electric Field Ii: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

A mass m is traveling at an initial speed v₀= 25.0 m/s.It is brought to rest in a distance of 62.5 m by a force of 15.0 N.The mass is