AP Physics Thanksgiving Pheast

AP Physics Thanksgiving Pheast

Reviewing Semester One

Unit 01 - Kinematics

• Motion in a straight line.

• Displacement, Velocity, Acceleration.

• Three Kinematic Equations that can only be used when acceleration is constant.

• Position and Velocity vs. Time Graphs.

Multiple Choice

What is this graph showing?

• Constant Speed
• Acceleration (speeding up)
• Deceleration (slowing down)
• No motion

Multiple Choice

What is the name of this kind of relationship?

• Open Top Parabola

• Inverse

• Linear

• Side Opening Parabola

Multiple Choice

The graph respresents

• no motion
• constant velocity
• increasing velocity
• decreasing velocity

Multiple Choice

What happens to the total distance that a ball travels as it falls off the side of a cliff?

• The distance remains constant 
• The distance increases at a uniform rate
• The distance increases at a nonuniform rate 
• The distance decreases at a uniform rate

Multiple Choice

What would the v-t graph look like for an object travelling at a constant velocity? 

• Curved line
• Straight line
• Horizontal line

Multiple Choice

Motion sensors recorded the following data about a runner during a cross-country race. During which segment of the race did the runner have the greatest speed?

• W
• X
• Y
• Z

Multiple Choice

The ball took 0.45 s to hit the ground 0.72 m from the table. What was the horizontal velocity of the ball as it rolled off the table?

• 0 m/s
• 0.63 m/s
• 1.6 m/s
• 2.2 m/s

Multiple Choice

You are about to go bungee jumping off a bridge that is 245 m high. You drop a pebble off the side. How much time will pass before the pebble hits the water?(s)

• 5

• 6

• 7

• 8

Multiple Choice

A  car starts from rest and after  7 seconds it is moving at 42  m/s. What is the car’s acceleration?

• 0.17
• 1.67
• 6
• 7

Multiple Choice

For this triangle, c = 8.55 m and b = 4.29 m (not drawn to scale).  What is angle a?

• 30.1 degrees
• 59.9 degrees
• 7.40 degrees
• 74.0 degrees

Multiple Choice

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Multiple Choice

Which graph represents zero acceleration (constant velocity)?

• A
• B
• C
• D

Multiple Choice

At what time did runner A pass runner B?

• 0 seconds
• 1 second
• 2 seconds
• 3 seconds

Multiple Choice

Which runner got a head start?

• red line runner
• blue line runner

Multiple Choice

What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 
• It increases at a uniform rate 
• It is constant 
• It increases at a non-uniform rate

Multiple Choice

Velocity is both ____ and _____.

• speed , direction

• direction, mass

• volume, density

• direction, magnitude

Multiple Choice

What is an example of acceleration?

• The change in velocity over time
• An object's speed changes
• An object in motion changes direction
• All of the above

Multiple Choice

If the acceleration of an object is zero, then that object cannot be moving.

• True

• False

Multiple Choice

A car accelerates from rest at a constant rate 5 m/s2 . Which of the following statements is true?

• A. The car travels 5 m in every second

• B. The car decreases its velocity 5 m/s in every second

• C. The car increases its velocity 5 m/s in every second

• D. The car’s velocity doesn’t change

Unit 02 - Dynamics

• Contact and Non-Contact Forces.

• Tension, Friction, Spring Force, Gravitational Force, Normal Force.

• Newton's Three Laws and their applications to Free Body Diagrams.

Multiple Choice

What causes a moving object to change direction? 

• acceleration
• inertia
• velocity
• force

Multiple Choice

Is it possible for the normal force to be zero?

• Yes. If the surface is horizontal.

• Yes. If the surface is vertical

• No. FN will always be less than Fg

• No. Fg will be less than FN.

Multiple Choice

Which of the following is not true about the system?

• T₃ is equal to the scalar sum of the magnitudes of T₂ and T₁

• T₃ is equal in magnitude to F_g

• The x- components of the T₁ and T₂ and equivalent but in opposite directions

• The system is in equilibrium.

Multiple Choice

To correct write Net Force, you need the amount, the units and the

• Direction
• Average
• Mass
• Acceleration

Multiple Choice

According to Newton’s First Law, if there is no net force acting on an object it will

• Move at the same speed
• Move in the same direction
• Move with the same speed and direction
• Eventually slow down and stop

Multiple Choice

Match description with free-body diagram.

• A book is at rest on a tabletop.
• A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling.
• An egg is free-falling from a nest in a tree. Neglect air resistance.
• A flying squirrel is gliding (no wing flaps) straight down from a tree to the ground at constant velocity. Consider air resistance.

Multiple Choice

Match the description with this free-body diagram.

• A book is at rest on a tabletop.
• A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling.
• An egg is free-falling from a nest in a tree. Neglect air resistance.
• A flying squirrel is gliding (no wing flaps) straight down from a tree to the ground at constant velocity. Consider air resistance.

Multiple Choice

Which of these is a non-contact force?

• normal
• gravity
• friction
• air resistance

Multiple Choice

Compare the acceleration of the 1-kg object with that of the 2-kg object.

• 1kg object has more acceleration because it has less mass

• 1kg object has less acceleration because it has less mass

• 2kg object has more acceleration because it has more mass

• 2kg object has less inertia because it has more mass

Multiple Choice

The greater the mass of an object,

• the easier the object starts moving.

• the greater its inertia.

• the more balanced it is.

• the more space it takes up.

Multiple Choice

A force of 50-N is applied to a 4 kilogram mass. The acceleration of the object is:

• 200 m/s²

• 12.5 m/s²

• 54 m/s²

• 46 m/s²

Multiple Choice

Are forces balanced or unbalanced when a marble rolls down a ramp?

• Balanced
• Unbalanced

Multiple Choice

If the net force is equal to zero, the forces acting on the object are

• balanced

• unbalanced

Multiple Choice

This type of force resist motion between two surfaces that are pressed together

• contact
• gravity
• friction

Multiple Choice

What is the x component of the vector in the diagram?

• 104N
• 60N
• -104N
• 95N

Multiple Choice

The length of a force vector represents the ______ of the force

• direction
• magnitude
• type
• cause

Multiple Choice

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 

• 0.78
• 0.51
• 0.78 N
• 0.58 N

Multiple Choice

What are 2 factors that determine the amount of friction between 2 objects?

• Force and roughness between surfaces
• hills and valleys and how smooth or rough the surface is
• Amount of force and amount of surface the comes in contact
• The force and the weight exerted on the surfaces

Multiple Choice

The mathematical relationship between Force on a Spring and Elastic Potential Energy is

• direct proportionality

• inverse proportionality

• an exponential

• no correlation

Multiple Choice

Which of the following is a true statement regarding springs?

• The higher the value of the spring constant, the stiffer the spring.  
• In Hooke's law, the force exerted by the spring acts in the same direction as displacement.  
• Springs are designed to provide unpredictable variations in force.  
• The force exerted by a spring has a quadratic relationship with the displacement form equilibrium.  

Unit 03 - Uniform Circular Motion

• Centripetal means "center-seeking"

• Force and Acceleration point inwards towards the center of rotation.

• Velocity is a forward tangent line.

• The direction of velocity is always changing along the circle points.

Multiple Choice

A bug on a turning phonograph record will make more turns per minute if it is located toward the center of the record.

• True
• False

Multiple Choice

Why do objects experience centripetal acceleration?

• Because they are speeding up as they move in a circle
• Because they are constantly changing direction and the net change is directed inward
• Because they are constantly changing both speed and direction
• Because when you have 100 people pedaling, you can speed up more easily.

Multiple Choice

If radius increases force will....

• decrease because they have a direct relationship

• decrease because they have a inverse relationship

• increase

• both

Multiple Choice

If velocity increases force will....

• increase because they have a direct relationship

• increase because they have a inverse relationship

• decrease

• both

Multiple Choice

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

Multiple Choice

Which represents the acceleration of the ball?

• A
• B
• C
• D

Multiple Choice

What is the force that causes centripetal acceleration when a car goes around a curve?

• Friction
• Gravity 
• Normal
• Tension

Multiple Choice

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

Multiple Choice

Which statement is true about an object that is traveling in uniform circular motion?

• The speed of the object varies.
• The net force on the object is directed toward the center of the circular path.
• The direction of the object's velocity is constant.
• The net force on the object is directed away from the center of the circular path.

Multiple Choice

Two children, Jack and Jill, ride on a merry-go-round. Jack is at a greater distance from the axis of rotation than Jill. Which of the following are true statements?

• Jill and Jack have the same tangential speed.

• Jack has a greater tangential speed than Jill.

• Jill has a greater angular speed than Jack.

• Jill has a smaller angular speed than Jack.

Multiple Choice

Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• The inside horse
• The outside horse
• Neither - they both have the same angular speed