Match the following:
(a) Gravitational force
(b) Friction
(c) Sound energy
(d) Electrical energy
(e) Muscular force
(f) Magnetic force
(g) Electrostatic force
i. A comb attracting paper pieces
ii. Pushing a box
iii. Force between two moving objects that slows them
iv. Students shouting at a playground
v. An electric oven is an example of this
vi. Water falling down from a tap is due to this
vii. A magnet attracting metal coins
Answer (2)
The matching of forces and types of energy to their descriptions includes gravitational force with water falling due to gravity, friction slowing moving objects, and sound energy related to students shouting. Other matches include electrical energy with an electric oven, muscular force as the act of pushing a box, magnetic force attracting metal coins, and electrostatic force attracting paper pieces with a charged comb. Each match explains how these forces and energies interact in real-life situations.
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To match each type of force or energy with the correct example, let's go through them one by one:
(a) Gravitational force : This is the force by which a planet or other body draws objects toward its center. Gravity is responsible for keeping us on the ground and for the motion of celestial bodies.
vi. Water falling down from a tap is due to this : This is because gravity pulls the water downward.
(b) Friction : This is the force that opposes the relative motion of two surfaces in contact. Friction is responsible for slowing things down and is important for activities like walking and driving.
iii. Force between two moving objects that slows them : This describes friction, as it opposes the motion.
(c) Sound energy : This is a form of energy associated with the vibration of matter, such as air, water, or solid objects.
iv. Students shouting at a playground : This generates sound energy as their vocal cords cause vibrations in the air.
(d) Electrical energy : This is energy generated by the movement of electric charges, usually in a wire.
v. An electric oven is an example of this : It uses electrical energy to produce heat and cook food.
(e) Muscular force : This refers to the force generated by muscles in the body when they contract or extend.
ii. Pushing a box : This involves muscular force as muscles in the arm and body apply force to move the box.
(f) Magnetic force : This is the attraction or repulsion that arises between electrically charged particles due to their motion.
vii. A magnet attracting metal coins : This is a clear example of magnetic force.
(g) Electrostatic force : This is the force experienced by charged objects. It can cause attraction or repulsion between objects.
i. A comb attracting paper pieces : This is due to electrostatic force, often seen after a comb is used and becomes electrically charged, attracting lightweight objects like paper pieces.
By understanding each type of force and how it applies to everyday examples, students can appreciate how these forces influence the world around them.
