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Worksheets3rd Quarter Review
Total questions: 30
Worksheet time: 43mins
Which example demonstrates a non-contact force acting between two objects?
The tension force in a rope pulling an object
The force of friction between two sliding blocks.
The normal force between an object and a surface.
The force exerted when two magnets repel each other.
A person holds a book stationary in their hand. The forces acting on the book include the gravitational force pulling it downward and the normal force from the hand pushing upward. Which best describes the interaction between these forces?
The normal force is a contact force, while the gravitational force is a non-contact force.
The gravitational and normal forces are contact forces acting between the book and the Earth’s surface.
The gravitational and normal forces are non-contact forces acting through the Earth's gravity and the hand’s field.
The gravitational and normal forces are contact forces because they involve physical interaction between objects.
What is the primary purpose of a Free Body Diagram (FBD)?
To find the shape of an object
To calculate the speed of an object
To determine the energy of an object
To visualize the forces acting on an object
What does the length of the arrows in a Free Body Diagram represent?
The shape of the object
The speed of the object
The position of the object
The magnitude of the forces acting on the object
If an object is at rest on a flat surface, what forces should be included in its Free Body Diagram?
Tension force and applied force
Air resistance and gravitational force
Frictional force and gravitational force
Normal force, gravitational force, and frictional force
When analyzing a Free Body Diagram, if the sum of all forces acting on the object is not zero, what does this imply?
The object is at rest
The object is moving with acceleration
The object is not experiencing any forces
The object is in equilibrium (balanced state)
A person pushes a box as shown in the figure. What is the net force of the object?
20 N to the right
40 N to the left
40 N to the right
zero
Which represents a scalar quantity?
A temperature of 30°C
A force of 10 N applied to a box
A displacement of 5 m to the East
A car moving at 60 km/h to the North
Which statement is correct about the difference between scalar and vector quantities?
Scalar and vector quantities are the same in all respects.
Scalar quantities have direction only, while vector quantities have magnitude and direction.
Scalar quantities have magnitude only, while vector quantities have magnitude and direction.
Scalar quantities have both magnitude and direction, while vector quantities only have magnitude
A person is sitting in a car that is moving at 20 m/s. Which is the most appropriate reference point to describe the car’s motion?
The dashboard of the car
A tree on the side of the road
The driver’s seat inside the car
The passenger sitting next to the driver
Which statement best describes distance?
The total path traveled by an object, regardless of direction
A vector quantity that includes both magnitude and direction
The shortest path between initial and final position of an object
The straight-line path between initial and final position of an object
If an object moves in a circular path and returns to its starting point, what is its displacement?
Equal to zero
Equal to the distance traveled
Equal to the radius of the circle
. Equal to the circumference of the circle
A car moves at a constant velocity of 30 m/s to the west. Which quantity is a scalar?
The speed of the car
The velocity of the car
The displacement of the car
The direction of the car’s movement
Which is an example of a velocity?
A car traveling at 60 km/h
A person walking for 10 meters
A runner moving at a constant speed
A boat moving at 15 m/s towards the South
Which material is a good conductor of heat?
Cloth
Glass
Metal
Rubber
What happens to the particles in a substance when it is heated?
They move faster and spread apart.
They stay the same and do not move.
They lose all energy and stop moving.
They move slower and closer together.
In which of the following materials does convection most commonly occur?
Liquid and Gases
Solid Metals
Solids like Wood
Vacuum space
Which statement is the best definition of temperature?
The material's ability to conduct heat
The measure of how hot or cold something is
The process of heat transfer between objects
The total energy of all the particles in an object
"A force is a push or pull in a particular direction. It results from an object's interaction with another object. It has two categories – contact and non-contact force. Contact forces result from two objects touching each other. Examples of contact forces include friction, tension, and air resistance. Non-contact forces act on an object without physical contact with another object. An example of non-contact force is gravity."
Based on the selection above, which of the scenario involves a non-contact force?
A ball rolling on the ground.
A car braking due to friction
A person pushing a cart across the floor
A charged object attracting small pieces of paper.
A student is pushing a box along a rough surface. The box moves when a force is applied by the student. Which force is responsible for preventing the box from moving initially, and how can it be categorized?
The gravitational force, a contact force acting downward.
The applied force, a non-contact force that acts on the box remotely
The normal force, a non-contact force acting perpendicular to the surface.
The frictional force, a contact force acting opposite to the applied force.
A swimmer is jumping off a diving board. Assume air resistance is negligible. Just before leaving the board, what is the correct Free Body Diagram for the swimmer?
A downward arrow representing gravity and no other forces.
Two arrows pointing downward for gravity and upward for the normal force, but larger than gravity.
A downward arrow representing gravity and an upward arrow representing the normal force from the board.
An upward arrow representing the person’s jumping force and a downward arrow representing gravity.
Two children are playing tug-of-war. One child pulls with a force of 150 N to the left, and the other pulls with a force of 100 N to the right. What happens to the rope?
The rope accelerates in both directions.
The rope remains stationary because the forces are balanced.
The rope moves to the left because the forces are unbalanced.
The rope moves to the right because the forces are unbalanced.
" The forces are said to be balanced, if the two individual forces are of equal magnitude and opposite direction. An unbalanced force acts upon an object only when there is an individual force that is not balanced by a force of equal magnitude, and in the opposite direction. "
Based on the selection above, which of the following is an example of unbalanced forces?
A book resting on a table
A ball sitting stationary on the ground
A car driving at constant speed on a highway
A person pulling a sled on snow and the sled starts to accelerate
" Scalars and vectors are two kinds of quantities that are used in physics and math. Scalars are quantities that only have magnitude (or size) while vectors have both magnitude and direction"
Which is an example of a vector quantity?
A car’s speed of 50 m/s
A temperature of 38 °F
A time interval of 10 seconds
A displacement of 5 km to East
Lucinda walked 800 meters, West from her house to the park. She then walked 500 meters, East from the park to her friend’s house, and walked another 500 meters, West back to the park. What is Lucinda's displacement?
500 m, East
800 m, West
1300 m, East
1800 m, West
Lucinda walked 800 meters, East to the Market. She then turned and walked 400 meters, North to the park. What is the total distance traveled by Lucinda?
400 m
800 m
1200 m
1200 m, Northeast
If a person walks 200 meters east in 50 seconds, then turns and walks 100 meters west in 25 seconds, what is their average velocity?
1.33 m/s, East
1.33 m/s, West
4 m/s, East
4 m/s, West
"In the winter, people wear thick coats made from materials such as wool or down. Wool is naturally very good at controlling body temperature. It is widely considered the best fabric for winter clothing due to its excellent insulation, breathability, and moisture-wicking properties. It traps body heat effectively, keeping you warm even in freezing temperatures, and remains comfortable by allowing air circulation."
Why are thick coats made from wool or down good for keeping your body warm?
They are good conductors of heat.
They reflect heat away from the body.
They absorb heat from the environment and store it.
They trap heat close to the body and reduce heat loss through conduction.
"In a microwave oven, food heats up by absorbing energy from microwaves."
Which best describes how the heat is transferred to the food?
The microwave reflects heat toward the food.
Convection transfers heat from the microwave to the food.
Radiation transfers the heat from the microwave to the food.
Conduction transfers heat from the microwave oven to the food.
Which example involves heat transfer by conduction?
Ironing of clothes
Blood circulation in warm-blooded animals
A person is standing next to a campfire and feels warm.
During the winter, a person feels the warmth of sunlight on their face
