Physics Chapter on Forces
62 Questions
4 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the unit of measurement for force?

  • Joule
  • Newton (correct)
  • Kilogram-force
  • Pascal

    • A stationary object experiences a force acting upon it.

    False

    What happens to a spring when a load is suspended from it?

    It stretches in the direction of the load.

    When forces act in opposite directions, the resultant force is the ______.

    <p>difference</p> Signup and view all the answers

    Match the actions with their effects on objects:

    <p>Pushing a door = Opens the door Squeezing a toothpaste tube = Changes its shape Stretching a spring = Causes elongation Pulling a box = Moves the box forward</p> Signup and view all the answers

    What is a force?

    <p>A push or a pull that changes the state of motion of an object</p> Signup and view all the answers

    A small force applied to a heavy body will always cause the body to move.

    <p>False</p> Signup and view all the answers

    Name two factors that can change the state of motion of an object.

    <p>Speed and direction</p> Signup and view all the answers

    When a person applies a force on an object and its direction of movement is away from the person, the object is being _____

    <p>pushed</p> Signup and view all the answers

    Match the following actions with the type of force they represent:

    <p>Kicking a ball = Push Pulling a rope = Pull Pushing a car = Push Dragging a box = Pull</p> Signup and view all the answers

    What happens when two forces act in the same direction on an object?

    <p>The resultant force is the sum of the forces.</p> Signup and view all the answers

    The resultant force is always equal to the sum of the forces acting on an object.

    <p>False</p> Signup and view all the answers

    What is the SI unit for measuring force?

    <p>Newton</p> Signup and view all the answers

    In a tug-of-war, the team that applies a larger _____ wins.

    <p>force</p> Signup and view all the answers

    Match the following effects of forces with their descriptions:

    <p>Make a stationary object move = Causing it to start moving Change speed of a moving object = Altering how fast it moves Change direction of a moving object = Redirecting its path Resultant force of equal opposing forces = Result is zero</p> Signup and view all the answers

    Which of the following is an example of a non-contact force?

    <p>Magnetic Force</p> Signup and view all the answers

    Electrostatic force can only be observed in conditions of high humidity.

    <p>False</p> Signup and view all the answers

    What materials can magnets exert a force on?

    <p>Iron, cobalt, or nickel</p> Signup and view all the answers

    Rubbing a plastic comb on dry hair creates an electric charge that exerts an __________ force on bits of paper.

    <p>electrostatic</p> Signup and view all the answers

    Match the following types of forces with their characteristics:

    <p>Magnetic Force = Acts on iron, cobalt, or nickel Electrostatic Force = Attracts small bits of paper Contact Force = Requires physical touch Non-contact Force = Acts at a distance</p> Signup and view all the answers

    What type of force opposes the motion between two surfaces in contact?

    <p>Frictional force</p> Signup and view all the answers

    Muscular force is exerted by non-living entities only.

    <p>False</p> Signup and view all the answers

    Name the two categories of forces.

    <p>Contact forces and non-contact forces</p> Signup and view all the answers

    The force exerted by muscles when running or walking is called __________.

    <p>muscular force</p> Signup and view all the answers

    Match the following types of forces with their definitions:

    <p>Contact Force = Force exerted by direct contact Frictional Force = Opposes the motion of objects in contact Muscular Force = Exerted by the muscles of the body Non-Contact Force = Force acting at a distance without contact</p> Signup and view all the answers

    Which of the following actions utilizes muscular force?

    <p>A person lifting a box</p> Signup and view all the answers

    Frictional force can help an object to move faster.

    <p>False</p> Signup and view all the answers

    What happens to a moving object when an opposing force is applied?

    <p>It slows down.</p> Signup and view all the answers

    What happens to a stone when it is dropped from a roof?

    <p>It falls to the ground.</p> Signup and view all the answers

    Electrostatic force is a type of contact force.

    <p>False</p> Signup and view all the answers

    What is the SI unit of force?

    <p>Newton</p> Signup and view all the answers

    The weight of a body on the moon is approximately __________ that on the surface of the earth.

    <p>1/6th</p> Signup and view all the answers

    Match the following terms with their correct descriptions:

    <p>Electrostatic Force = A non-contact force Gravitational Force = Always pulls objects downwards Pascal's Law = Describes pressure in fluids Weight = The force with which an object is pulled towards the Earth</p> Signup and view all the answers

    What is the conclusion drawn from the demonstration with pins A and B?

    <p>Pressure is inversely proportional to the area.</p> Signup and view all the answers

    A camel's broad feet increase the pressure exerted on the sand.

    <p>False</p> Signup and view all the answers

    Why do army tanks use caterpillar tracks instead of wheels?

    <p>To increase surface area and reduce pressure on the ground.</p> Signup and view all the answers

    Pressure in a liquid increases with ______ due to the weight of the liquid above.

    <p>depth</p> Signup and view all the answers

    Match the following scenarios with their effects on pressure:

    <p>Camel on sand = Reduces pressure Narrow horse's foot = Increases pressure Wide truck tires = Reduces pressure High buildings on wide foundations = Reduces pressure</p> Signup and view all the answers

    Which of the following best defines pressure?

    <p>Force acting normally upon the unit area of a surface</p> Signup and view all the answers

    Pascal's Law states that pressure in a fluid is transmitted equally in all directions.

    <p>True</p> Signup and view all the answers

    Calculate the pressure exerted when a force of 250 N is applied over an area of 0.05 m².

    <p>5000 N/m² or 5000 Pa</p> Signup and view all the answers

    A solid cube measuring 25 cm x 25 cm x 25 cm exerts a pressure of ______ when placed on a surface.

    <p>10⁴ N/m² or 10 Pa</p> Signup and view all the answers

    Match the following values with their corresponding units:

    <p>N/m² = Pascal kPa = Kilopascal 1000 Pa = 1 kPa Pressure = Thrust / Area</p> Signup and view all the answers

    If the area of contact is doubled while keeping the force constant, what happens to the pressure?

    <p>It halves</p> Signup and view all the answers

    What is the SI unit of pressure?

    <p>Pascal (Pa)</p> Signup and view all the answers

    Pressure is independent of the magnitude of force applied.

    <p>False</p> Signup and view all the answers

    What is the primary reason for drawing pins being sharp on one end?

    <p>To apply concentrated pressure</p> Signup and view all the answers

    The pressure exerted by a liquid decreases as depth increases.

    <p>False</p> Signup and view all the answers

    What device measures pressure using a difference in liquid levels?

    <p>manometer</p> Signup and view all the answers

    Long skis have a large cross-sectional area, which __________ the pressure on the snow.

    <p>reduces</p> Signup and view all the answers

    Match the following components with their uses in a pressure detector:

    <p>Plastic funnel = Holds the water Rubber balloon = Creates adjustable pressure Rubber tube = Connects funnel to manometer Water in manometer = Helps measure pressure change</p> Signup and view all the answers

    What phenomenon occurs when light hits a surface and creates an image?

    <p>Reflection</p> Signup and view all the answers

    The deeper you go in a liquid, the less pressure you feel.

    <p>False</p> Signup and view all the answers

    Describe the relationship between depth and pressure in a liquid.

    <p>Pressure increases with depth.</p> Signup and view all the answers

    What happens to the pressure exerted by a liquid as the depth increases?

    <p>It increases.</p> Signup and view all the answers

    A gas exerts pressure in a container only in one direction.

    <p>False</p> Signup and view all the answers

    What causes a balloon to inflate when air is blown into it?

    <p>The air inside exerts pressure on the inner walls of the balloon.</p> Signup and view all the answers

    Atmospheric pressure decreases with increasing _______.

    <p>altitude</p> Signup and view all the answers

    Match the factors affecting atmospheric pressure with their effects:

    <p>Altitude = Pressure decreases as altitude increases. Temperature = Warmer air leads to lower pressure. Humidity = More water vapor increases pressure. Density = Higher density results in higher pressure.</p> Signup and view all the answers

    What demonstrates the effect of atmospheric pressure in the provided activity with a tumbler?

    <p>Cardboard supports the water due to atmospheric pressure.</p> Signup and view all the answers

    Humidity has no effect on atmospheric pressure.

    <p>False</p> Signup and view all the answers

    What is the expected observation when water is poured into a vessel with a balloon tied to the opening?

    <p>The balloon bulges as the water level rises.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser