Question 1

In the figure,if the tension in string 1 is 34 N and the tension in string 2 is 24 N,what is the mass of the object shown?
​  
​

Accepted Answer

A) 7.3 kg 
B) 5.5 kg 
C) 1.8 kg 
D) 3.7 kg 
E) 4.5 kg 
A) 7.3 kg 
B) 5.5 kg 
C) 1.8 kg 
D) 3.7 kg 
E) 4.5 kg

Question 2

Two identical springs with spring constant 50 N/m support a 5.0 N weight as in the picture below.What is the tension in spring A?

Accepted Answer

A) 1.45 N 
B) 2.50 N 
C) 2.89 N 
D) 3.75 N 
E) 5.00 N 
A) 1.45 N 
B) 2.50 N 
C) 2.89 N 
D) 3.75 N 
E) 5.00 N

Question 3

A box rests on the (horizontal)back of a truck.The coefficient of static friction between the box and the surface on which it rests is 0.24.What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration)in 3.0 s without having the box slide?

Accepted Answer

A) 14 m 
B) 11 m 
C) 19 m 
D) 24 m 
E) 29 m 
A) 14 m 
B) 11 m 
C) 19 m 
D) 24 m 
E) 29 m

Question 4

If M = 2.2 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

Accepted Answer

A) 6.4 N 
B) 5.9 N 
C) 5.4 N 
D) 6.9 N 
E) 8.3 N 
A) 6.4 N 
B) 5.9 N 
C) 5.4 N 
D) 6.9 N 
E) 8.3 N

Question 5

Two experiments are performed.In (A),an 18.0 N force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block.In (B),an 18.0 N force pushes on a 4.00 kg block that then pushes on a 2.00 kg block.Which statement is correct?

Accepted Answer

A) The acceleration is 3.00 m/s2 in both (
A) and (
B) . 
B) The acceleration is 4.50 m/s2 in both (
A) and (
B) . 
C) The acceleration is 6.00 m/s2 in both (
A) and (
B) . 
D) The acceleration is 9.00 m/s2 in both (
A) and (
B) . 
E) The 2.00 kg block has a 9.00 m/s2 acceleration.The 4.00 kg block has a 4.50 m/s2 acceleration. 
A) The acceleration is 3.00 m/s2 in both (
A) and (
B) . 
B) The acceleration is 4.50 m/s2 in both (
A) and (
B) . 
C) The acceleration is 6.00 m/s2 in both (
A) and (
B) . 
D) The acceleration is 9.00 m/s2 in both (
A) and (
B) . 
E) The 2.00 kg block has a 9.00 m/s2 acceleration.The 4.00 kg block has a 4.50 m/s2 acceleration.

Question 6

A 2.0-kg block slides on a rough horizontal surface.A force (magnitude P = 4.0 N)acting parallel to the surface is applied to the block.The magnitude of the block's acceleration is 1.2 m/s2.If P is increased to 5.0 N,determine the magnitude of the block's acceleration.

Accepted Answer

A) 2.1 m/s2 
B) 2.3 m/s2 
C) 1.9 m/s2 
D) 1.7 m/s2 
E) 3.2 m/s2 
A) 2.1 m/s2 
B) 2.3 m/s2 
C) 1.9 m/s2 
D) 1.7 m/s2 
E) 3.2 m/s2

Question 7

Exhibit 5-1
A 2.30 kg mass is suspended from the ceiling and a 1.70 kg mass is suspended from the 2.30 kg mass,as shown.The tensions in the strings are labeled   and   .   Use this exhibit to answer the following question(s).
-Refer to Exhibit 5-1.A hand exerts an upward force of 6.70 N on the 1.70 kg mass.The magnitudes of the tensions are

Accepted Answer

A) T1 = 15.8 N;T2 = 10.0 N. 
B) T1 = 15.8 N;T2 = 16.7 N. 
C) T1 = 22.5 N;T2 = 10.0 N. 
D) T1 = 22.5 N;T2 = 16.7 N. 
E) T1 = 32.5 N;T2 = 10.0 N. 
A) T1 = 15.8 N;T2 = 10.0 N. 
B) T1 = 15.8 N;T2 = 16.7 N. 
C) T1 = 22.5 N;T2 = 10.0 N. 
D) T1 = 22.5 N;T2 = 16.7 N. 
E) T1 = 32.5 N;T2 = 10.0 N.

Question 8

A block is pushed across a horizontal surface by the force shown.If the coefficient of kinetic friction between the block and the surface is 0.30,F = 20 N,θ = 30°,and M = 3.0 kg,what is the magnitude of the acceleration of the block?

Accepted Answer

A) 2.8 m/s2 
B) 2.3 m/s2 
C) 1.8 m/s2 
D) 3.3 m/s2 
E) 5.4 m/s2 
A) 2.8 m/s2 
B) 2.3 m/s2 
C) 1.8 m/s2 
D) 3.3 m/s2 
E) 5.4 m/s2

Question 9

In order to jump off the floor,the floor must exert a force on you

Accepted Answer

A) in the direction of and equal to your weight. 
B) opposite to and equal to your weight. 
C) in the direction of and less than your weight. 
D) opposite to and less than your weight. 
E) opposite to and greater than your weight. 
A) in the direction of and equal to your weight. 
B) opposite to and equal to your weight. 
C) in the direction of and less than your weight. 
D) opposite to and less than your weight. 
E) opposite to and greater than your weight.

Question 10

If F = 40 N and M = 1.5 kg,what is the tension in the string connecting M and 2M? Assume that all surfaces are frictionless.

Accepted Answer

A) 13 N 
B) 23 N 
C) 36 N 
D) 15 N 
E) 28 N 
A) 13 N 
B) 23 N 
C) 36 N 
D) 15 N 
E) 28 N

Question 11

Two blocks are accelerated across a horizontal frictionless surface as shown.Frictional forces keep the two blocks from sliding relative to each other,and the two move with the same acceleration.If F = 1.2 N and M = 1.0 kg,what is the horizontal component (frictional force)of the force of the small block on the large block?

Accepted Answer

A) 0.48 N to the right 
B) 0.72 N to the right 
C) 0.72 N to the left 
D) 0.48 N to the left 
E) 0.65 N to the left 
A) 0.48 N to the right 
B) 0.72 N to the right 
C) 0.72 N to the left 
D) 0.48 N to the left 
E) 0.65 N to the left

Question 12

If M = 1.1 kg,what is the tension in string 1?

Accepted Answer

A) 54 N 
B) 47 N 
C) 40 N 
D) 62 N 
E) 57 N 
A) 54 N 
B) 47 N 
C) 40 N 
D) 62 N 
E) 57 N

Question 13

An object on the flat bed of a truck that is accelerating along a straight horizontal road.The coefficient of static friction is 0.300 in this case.Of the following choices,which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?

Accepted Answer

A) 0.280 m/s2 
B) 0.310 m/s2 
C) 2.93 m/s2 
D) 2.99 m/s2 
E) 3.02 m/s2 
A) 0.280 m/s2 
B) 0.310 m/s2 
C) 2.93 m/s2 
D) 2.99 m/s2 
E) 3.02 m/s2

Question 14

In the figure,the coefficient of kinetic friction between the surface and the larger block is 0.20,and the coefficient of kinetic friction between the surface and the smaller block is 0.30.If F = 14 N and M = 1.0 kg,what is the magnitude of the acceleration of either block?

Accepted Answer

A) 2.0 m/s2 
B) 1.3 m/s2 
C) 1.5 m/s2 
D) 1.8 m/s2 
E) 3.5 m/s2 
A) 2.0 m/s2 
B) 1.3 m/s2 
C) 1.5 m/s2 
D) 1.8 m/s2 
E) 3.5 m/s2

Question 15

A 2.0-kg object has a velocity of 4.0  
M/s at t = 0.A constant resultant force of (2.0  
+ 4)0  
)N then acts on the object for 3.0 s.What is the magnitude of the object's velocity at the end of the 3.0-s interval?

Accepted Answer

A) 9.2 m/s 
B) 6.3 m/s 
C) 8.2 m/s 
D) 7.2 m/s 
E) 7.7 m/s 
A) 9.2 m/s 
B) 6.3 m/s 
C) 8.2 m/s 
D) 7.2 m/s 
E) 7.7 m/s

Question 16

The surface of the inclined plane shown is frictionless.If F = 30 N,what is the magnitude of the force exerted on the 3.0-kg block by the 2.0-kg block?

Accepted Answer

A) 18 N 
B) 27 N 
C) 24 N 
D) 21 N 
E) 15 N 
A) 18 N 
B) 27 N 
C) 24 N 
D) 21 N 
E) 15 N

Question 17

If M = 2.0 kg,what is the tension in string 1?

Accepted Answer

A) 1.2 N 
B) 11 N 
C) 34 N 
D) 3.5 N 
E) 40 N 
A) 1.2 N 
B) 11 N 
C) 34 N 
D) 3.5 N 
E) 40 N

Question 18

Two blocks in contact with each other are pushed to the right across a rough horizontal surface by the two forces shown.If the coefficient of kinetic friction between each of the blocks and the surface is 0.30,determine the magnitude of the force exerted on the 2.0-kg block by the 3.0-kg block.

Accepted Answer

A) 15 N 
B) 25 N 
C) 11 N 
D) 22 N 
E) 33 N 
A) 15 N 
B) 25 N 
C) 11 N 
D) 22 N 
E) 33 N

Question 19

You have a machine which can accelerate pucks on frictionless ice.Starting from rest,the puck travels a distance x in time t when force F is applied.If force 3F is applied,the distance the puck travels in time t is

Accepted Answer

A) x. 
B) (3/2)x. 
C) 3x. 
D) (9/2)x. 
E) 9x. 
A) x. 
B) (3/2)x. 
C) 3x. 
D) (9/2)x. 
E) 9x.

Question 20

In a game of shuffleboard (played on a horizontal surface),a puck is given an initial speed of 6.0 m/s.It slides a distance of 9.0 m before coming to rest.What is the coefficient of kinetic friction between the puck and the surface?

Accepted Answer

A) 0.20 
B) 0.18 
C) 0.15 
D) 0.13 
E) 0.27 
A) 0.20 
B) 0.18 
C) 0.15 
D) 0.13 
E) 0.27

Exam 5: The Laws of Motion

In the figure,if the tension in string 1 is 34 N and the tension in string 2 is 24 N,what is the mass of the object shown? ​ ​

Two identical springs with spring constant 50 N/m support a 5.0 N weight as in the picture below.What is the tension in spring A?

A box rests on the (horizontal)back of a truck.The coefficient of static friction between the box and the surface on which it rests is 0.24.What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration)in 3.0 s without having the box slide?

If M = 2.2 kg,what is the tension in the connecting string? The pulley and all surfaces are frictionless.

Two experiments are performed.In (A),an 18.0 N force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block.In (B),an 18.0 N force pushes on a 4.00 kg block that then pushes on a 2.00 kg block.Which statement is correct?

A 2.0-kg block slides on a rough horizontal surface.A force (magnitude P = 4.0 N)acting parallel to the surface is applied to the block.The magnitude of the block's acceleration is 1.2 m/s2.If P is increased to 5.0 N,determine the magnitude of the block's acceleration.

A block is pushed across a horizontal surface by the force shown.If the coefficient of kinetic friction between the block and the surface is 0.30,F = 20 N,θ = 30°,and M = 3.0 kg,what is the magnitude of the acceleration of the block?

In order to jump off the floor,the floor must exert a force on you

If F = 40 N and M = 1.5 kg,what is the tension in the string connecting M and 2M? Assume that all surfaces are frictionless.

If M = 1.1 kg,what is the tension in string 1?

An object on the flat bed of a truck that is accelerating along a straight horizontal road.The coefficient of static friction is 0.300 in this case.Of the following choices,which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?

In the figure,the coefficient of kinetic friction between the surface and the larger block is 0.20,and the coefficient of kinetic friction between the surface and the smaller block is 0.30.If F = 14 N and M = 1.0 kg,what is the magnitude of the acceleration of either block?

A 2.0-kg object has a velocity of 4.0 M/s at t = 0.A constant resultant force of (2.0 + 4)0 )N then acts on the object for 3.0 s.What is the magnitude of the object's velocity at the end of the 3.0-s interval?

The surface of the inclined plane shown is frictionless.If F = 30 N,what is the magnitude of the force exerted on the 3.0-kg block by the 2.0-kg block?

If M = 2.0 kg,what is the tension in string 1?

Two blocks in contact with each other are pushed to the right across a rough horizontal surface by the two forces shown.If the coefficient of kinetic friction between each of the blocks and the surface is 0.30,determine the magnitude of the force exerted on the 2.0-kg block by the 3.0-kg block.

You have a machine which can accelerate pucks on frictionless ice.Starting from rest,the puck travels a distance x in time t when force F is applied.If force 3F is applied,the distance the puck travels in time t is

In a game of shuffleboard (played on a horizontal surface),a puck is given an initial speed of 6.0 m/s.It slides a distance of 9.0 m before coming to rest.What is the coefficient of kinetic friction between the puck and the surface?

Physics and Measurement

Motion in One Dimension

Vectors

Motion in Two Dimensions

Circular Motion and Other Applications of Newtons Laws

Energy of a System

Conservation of Energy

Linear Momentum and Collisions

Rotation of a Rigid Object About a Fixed Axis

Angular Momentum

Static Equilibrium and Elasticity

Universal Gravitation

Fluid Mechanics

Oscillatory Motion

Wave Motion

Sound Waves

Superposition and Standing Waves

Temperature

The First Law of Thermodynamics

The Kinetic Theory of Gases

Heat Engines, entropy, and the Second Law of Thermodynamics

Electric Fields

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current and Resistance

Direct-Current Circuits

Magnetic Fields

Sources of the Magnetic Field

Faradays Law

Inductance

Alternating-Current Circuits

Electromagnetic Waves

The Nature of Light and the Principles of Ray Optics

Image Formation

Wave Optics

Diffraction Patterns and Polarization

Relativity

Introduction to Quantum Physics

Quantum Mechanics

Atomic Physics

Molecules and Solids

Nuclear Structure

Applications of Nuclear Physics

Particle Physics and Cosmology

Filters

In the figure,if the tension in string 1 is 34 N and the tension in string 2 is 24 N,what is the mass of the object shown?

A 2.0-kg block slides on a rough horizontal surface.A force (magnitude P = 4.0 N)acting parallel to the surface is applied to the block.The magnitude of the block's acceleration is 1.2 m/s².If P is increased to 5.0 N,determine the magnitude of the block's acceleration.