Question 1

The figure shows the velocity of a particle as it travels along the x-axis.What is the direction of the acceleration at t = 0.5 s?

Accepted Answer

A)  in the +x direction 
B)  in the -x direction 
C)  The acceleration is zero. 
A)  in the +x direction 
B)  in the -x direction 
C)  The acceleration is zero.

Question 2

The figure shows a graph of the velocity as a function of time for a basketball player traveling up and down the court in a straight-line path.for the 10 s shown on the graph,find
(a)the net displacement of the player.
(b)the total distance run by the player.

Accepted Answer

The answer of The figure shows a graph of the...

Question 3

If the fastest you can safely drive is   what is the longest time you can stop for dinner if you must travel   in   total?

Accepted Answer

A)  1.0 h 
B)  1.3 h 
C)  1.4 h 
D)  You can't stop at all. 
A)  1.0 h 
B)  1.3 h 
C)  1.4 h 
D)  You can't stop at all.

Question 4

A runner maintains constant acceleration after starting from rest as she runs a distance of   .The runner's speed at the end of the 60.0 m is 9.00 m/s.How much time did it take the runner to complete the 60.0 m distance?

Accepted Answer

A)  6.67 s 
B)  15.0 s 
C)  9.80 s 
D)  10.2 s 
E)  13.3 s 
A)  6.67 s 
B)  15.0 s 
C)  9.80 s 
D)  10.2 s 
E)  13.3 s

Question 5

The position of an object as a function of time is given by   where       and   (a)Find the instantaneous acceleration at t = 2.4 s.
(b)Find the average acceleration over the first 2.4 seconds.

Accepted Answer

The answer of The position of an object as a...

Question 6

A ball rolls across a floor with an acceleration of 0.100 m/s2 in a direction opposite to its velocity.The ball has a velocity of 4.00 m/s after rolling a distance 6.00 m across the floor.What was the initial speed of the ball?

Accepted Answer

A)  4.15 m/s 
B)  5.85 m/s 
C)  4.60 m/s 
D)  5.21 m/s 
E)  3.85 m/s 
A)  4.15 m/s 
B)  5.85 m/s 
C)  4.60 m/s 
D)  5.21 m/s 
E)  3.85 m/s

Question 7

Suppose that a car traveling to the west (the -x direction)begins to slow down as it approaches a traffic light.Which statement concerning its acceleration in the x direction is correct?

Accepted Answer

A)  Both its acceleration and its velocity are positive. 
B)  Both its acceleration and its velocity are negative. 
C)  Its acceleration is positive but its velocity is negative. 
D)  Its acceleration is negative but its velocity is positive. 
A)  Both its acceleration and its velocity are positive. 
B)  Both its acceleration and its velocity are negative. 
C)  Its acceleration is positive but its velocity is negative. 
D)  Its acceleration is negative but its velocity is positive.

Question 8

The figure represents the velocity of a particle as it travels along the x-axis.At what value (or values)of t is the instantaneous acceleration equal to zero?

Accepted Answer

A)  t = 0 
B)  t = 0.5 s and t = 2 s 
C)  t = 1 s 
A)  t = 0 
B)  t = 0.5 s and t = 2 s 
C)  t = 1 s

Question 9

Two objects are dropped from a bridge,an interval of 1.0 s apart,and experience no appreciable air resistance.As time progresses,the DIFFERENCE in their speeds

Accepted Answer

A)  increases. 
B)  remains constant. 
C)  decreases. 
D)  increases at first, but then stays constant. 
E)  decreases at first, but then stays constant. 
A)  increases. 
B)  remains constant. 
C)  decreases. 
D)  increases at first, but then stays constant. 
E)  decreases at first, but then stays constant.

Question 10

The velocity of an object is given by the expression   ,where t is in seconds.Determine the position of the object as a function of time if it is located at   at time   .

Accepted Answer

A)  (4.00 m/s)t + 1.00 m 
B)  (3.00 m/s)t + (1.33 m/s3)t3 
C)  (4.00 m/s)t 
D)  1.33 m 
E)  1.00 m + (3.00 m/s)t + (1.33 m/s3)t3 
A)  (4.00 m/s)t + 1.00 m 
B)  (3.00 m/s)t + (1.33 m/s3)t3 
C)  (4.00 m/s)t 
D)  1.33 m 
E)  1.00 m + (3.00 m/s)t + (1.33 m/s3)t3

Question 11

The figure represents the position of a particle as it travels along the x-axis.Between   and   ,what is (a)the average speed of the particle and (b)the average velocity of the particle?

Accepted Answer

(a)1.0 m/s

Question 12

A dragster starts from rest and travels 1/4 mi in 6.70 s with constant acceleration.What is its velocity when it crosses the finish line?

Accepted Answer

A)  296 mi/h 
B)  269 mi/h 
C)  188 mi/h 
D)  135 mi/h 
A)  296 mi/h 
B)  269 mi/h 
C)  188 mi/h 
D)  135 mi/h

Question 13

A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff.A second rock is thrown vertically from the cliff,and it takes this rock   to reach the ground below the cliff from the time it is released.With what velocity was the second rock thrown,assuming no air resistance?

Accepted Answer

A)  4.76 m/s upward 
B)  5.51 m/s downward 
C)  12.3 m/s upward 
D)  4.76 m/s downward 
E)  12.3 m/s downward 
A)  4.76 m/s upward 
B)  5.51 m/s downward 
C)  12.3 m/s upward 
D)  4.76 m/s downward 
E)  12.3 m/s downward

Question 14

A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s.At this time,the driver suddenly realizes that she must stop the car.If it takes 0.200 s for the driver to apply the brakes,what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?

Accepted Answer

A)  2.89 m/s2 
B)  3.89 m/s2 
C)  4.17 m/s2 
D)  3.42 m/s2 
E)  2.08 m/s2 
A)  2.89 m/s2 
B)  3.89 m/s2 
C)  4.17 m/s2 
D)  3.42 m/s2 
E)  2.08 m/s2

Question 15

Two identical stones are dropped from rest and feel no air resistance as they fall.Stone A is dropped from height h,and stone B is dropped from height 2h.If stone A takes time t to reach the ground,stone B will take time

Accepted Answer

A)  4t. 
B)  2t. 
C)  t   . 
D)  t/   . 
E)  t/2. 
A)  4t. 
B)  2t. 
C)  t   . 
D)  t/   . 
E)  t/2.

Question 16

A package is dropped from a helicopter moving upward at   If it takes   before the package strikes the ground,how high above the ground was the package when it was released if air resistance is negligible?

Accepted Answer

A)  810 m 
B)  1000 m 
C)  1200 m 
D)  1500 m 
A)  810 m 
B)  1000 m 
C)  1200 m 
D)  1500 m

Question 17

Which one of the following graphs could possibly represent the vertical position as a function of time for an object in free fall?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

The velocity of an object as a function of time is given by v(t)= 2.00 m/s +   -   .Determine the instantaneous acceleration of the object at time   .

Accepted Answer

A)  -8.00 m/s2 
B)  -7.00 m/s2 
C)  2.00 m/s2 
D)  0.00 m/s2 
E)  -2.00 m/s2 
A)  -8.00 m/s2 
B)  -7.00 m/s2 
C)  2.00 m/s2 
D)  0.00 m/s2 
E)  -2.00 m/s2

Question 19

A foul ball is hit straight up into the air with a speed of 30.0 m/s.
(a)Calculate the time required for the ball to rise to its maximum height.
(b)Calculate the maximum height reached by the ball.
(c)Determine the time at which the ball pass a point 25.0 m above the point of contact between the bat and ball.
(d)Explain why there are two answers to part (c).

Accepted Answer

(a)3.06 s (b)45.9 m (c)0.995 s

Exam 2: Motion Along a Straight Line

The figure shows the velocity of a particle as it travels along the x-axis.What is the direction of the acceleration at t = 0.5 s?

The figure shows a graph of the velocity as a function of time for a basketball player traveling up and down the court in a straight-line path.for the 10 s shown on the graph,find (a)the net displacement of the player. (b)the total distance run by the player.

If the fastest you can safely drive is what is the longest time you can stop for dinner if you must travel in total?

A runner maintains constant acceleration after starting from rest as she runs a distance of .The runner's speed at the end of the 60.0 m is 9.00 m/s.How much time did it take the runner to complete the 60.0 m distance?

The position of an object as a function of time is given by where and (a)Find the instantaneous acceleration at t = 2.4 s. (b)Find the average acceleration over the first 2.4 seconds.

A ball rolls across a floor with an acceleration of 0.100 m/s2 in a direction opposite to its velocity.The ball has a velocity of 4.00 m/s after rolling a distance 6.00 m across the floor.What was the initial speed of the ball?

Suppose that a car traveling to the west (the -x direction)begins to slow down as it approaches a traffic light.Which statement concerning its acceleration in the x direction is correct?

The figure represents the velocity of a particle as it travels along the x-axis.At what value (or values)of t is the instantaneous acceleration equal to zero?

Two objects are dropped from a bridge,an interval of 1.0 s apart,and experience no appreciable air resistance.As time progresses,the DIFFERENCE in their speeds

The velocity of an object is given by the expression ,where t is in seconds.Determine the position of the object as a function of time if it is located at at time .

The figure represents the position of a particle as it travels along the x-axis.Between and ,what is (a)the average speed of the particle and (b)the average velocity of the particle?

A dragster starts from rest and travels 1/4 mi in 6.70 s with constant acceleration.What is its velocity when it crosses the finish line?

Two identical stones are dropped from rest and feel no air resistance as they fall.Stone A is dropped from height h,and stone B is dropped from height 2h.If stone A takes time t to reach the ground,stone B will take time

A package is dropped from a helicopter moving upward at If it takes before the package strikes the ground,how high above the ground was the package when it was released if air resistance is negligible?

Which one of the following graphs could possibly represent the vertical position as a function of time for an object in free fall?

The velocity of an object as a function of time is given by v(t)= 2.00 m/s + - .Determine the instantaneous acceleration of the object at time .

Units,physical Quantities,and Vectors

Motion in Two or Three Dimensions

Newtons Laws of Motion

Applying Newtons Laws

Work and Kinetic Energy

Potential Energy and Energy Conservation

Momentum,impulse,and Collisions

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

Fluid Mechanics

Gravitation

Periodic Motion

Mechanical Waves

Sound and Hearing

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current,resistance,and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic Field

Electromagnetic Induction

Inductance

Alternating Current

Electromagnetic Waves

The Nature and Propagation of Light

Geometric Optics

Interference

Diffraction

Relativity

Photons: Light Waves Behaving As Particles

Particles Behaving As Waves

Quantum Mechanics

Atomic Structure

Molecules and Condensed Matter

Nuclear Physics

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Filters

A ball rolls across a floor with an acceleration of 0.100 m/s² in a direction opposite to its velocity.The ball has a velocity of 4.00 m/s after rolling a distance 6.00 m across the floor.What was the initial speed of the ball?