Level 1
What is the definition of work in physics?
A) Applying force to an object without moving it
B) Applying force and causing displacement in the direction of the force
C) The rate at which speed changes over time
D) Storing energy without applying force
Answer: B) Applying force and causing displacement in the direction of the force
What is an inclined plane used for?
A) Increasing the force needed
B) Lifting heavy objects more easily
C) Generating electricity
D) None of the above
Answer: B) Lifting heavy objects more easily
A lever consists of which main parts?
A) A wheel and axle
B) A fulcrum and arm
C) An inclined plane and pulley
D) A base and an axle
Answer: B) A fulcrum and arm
A wedge works by...
A) Increasing the distance over which a force is applied
B) Splitting or lifting objects apart
C) Changing the direction of a load
D) Decreasing the effort force
Answer: B) Splitting or lifting objects apart
If you use a lever to lift a heavy rock, where should you place the fulcrum to reduce effort?
A) Close to the rock
B) Close to the force applied
C) At the midpoint
D) Farther from the rock
Answer: A) Close to the rock
Which of the following is an example of work being done?
A) Pushing against a wall
B) Holding a book in place
C) Moving a box across the floor
D) Standing still while carrying a backpack
Answer: C) Moving a box across the floor
A wedge is most similar to which simple machine?
A) Lever
B) Inclined Plane
C) Pulley
D) Wheel and Axle
Answer: B) Inclined Plane
A screw is an inclined plane that...
A) Is flat and wide
B) Has a pointed tip
C) Is wrapped around a shaft
D) Is only used to fasten objects
Answer: C) Is wrapped around a shaft
The efficiency of a machine is the ratio of...
A) Work input to work output
B) Energy loss to total energy
C) Work output to work input
D) Force to velocity
Answer: C) Work output to work input
What type of simple machine is a seesaw an example of?
A) Pulley
B) Wedge
C) Lever
D) Inclined Plane
Answer: C) Lever
How does an inclined plane make work easier?
A) By increasing the force needed
B) By decreasing the distance
C) By allowing the force to be applied over a longer distance
D) By decreasing the weight of the object
Answer: C) By allowing the force to be applied over a longer distance
In a pulley system, how is work made easier?
A) By increasing the distance over which the force acts
B) By adding more weight
C) By changing the direction of the force
D) By eliminating friction
Answer: C) By changing the direction of the force
How do simple machines affect work?
A) They increase the work required
B) They reduce the amount of work required
C) They make work easier by changing force or distance
D) They eliminate the need for force altogether
Answer: C) They make work easier by changing force or distance
The efficiency equation can help determine...
A) The amount of friction
B) The total mass of an object
C) How effective a machine is at conserving energy
D) The speed of an object
Answer: C) How effective a machine is at conserving energy
In which of these situations is no work done?
A) Lifting a book onto a shelf
B) Pushing a wall
C) Rolling a ball
D) Moving a cart across the room
Answer: B) Pushing a wall
What is a simple machine?
A) A device that changes the direction or amount of force
B) A complex tool requiring electricity
C) A type of engine
D) None of the above
Answer: A) A device that changes the direction or amount of force
Which machine would be best for raising a flag on a flagpole?
A) Lever
B) Inclined Plane
C) Pulley
D) Wedge
Answer: C) Pulley
In a wheel and axle system, the wheel is usually larger to...
A) Reduce the amount of distance
B) Increase speed and reduce force
C) Increase friction
D) Add weight to the load
Answer: B) Increase speed and reduce force
What role does an inclined plane play in reducing work?
A) It reduces distance
B) It allows lifting with less force over a longer distance
C) It increases speed
D) It reduces friction
Answer: B) It allows lifting with less force over a longer distance
A person uses a pulley to lift a box with less force. What simple machine principle is in action?
A) Work reduction
B) Directional force change
C) Friction increase
D) Weight increase
Answer: B) Directional force change
Which of these is NOT considered a simple machine?
A) Lever
B) Pulley
C) Engine
D) Inclined Plane
Answer: C) Engine
Which of the following is NOT an inclined plane?
A) A ramp
B) A screw
C) A ladder
D) A shovel
Answer: D) A shovel
Which of the following is an example of a complex machine?
A) Screw
B) Pulley system
C) Bicycle
D) Inclined plane
Answer: C) Bicycle
Using a ramp to move a box up a slope requires less...
A) Distance
B) Energy
C) Force
D) Speed
Answer: C) Force
When using a wedge, what happens to the force applied?
A) It decreases as the distance increases
B) It splits and moves in different directions
C) It stays constant throughout
D) It combines with friction to create more force
Answer: B) It splits and moves in different directions