Understanding Forces Quiz

What are the key concepts revised before introducing the topic of forces?

• Friction, inertia, and mass

• Speed, velocity, and motion

• Energy, work, and power

• Pressure, volume, and temperature

What simple activity was used to help students understand contact forces?

• Closing and opening a door

• Swinging a pendulum

• Lifting a weight

• Throwing a ball

Which materials are needed for the magnetic force demonstration?

• Straw, paper, and pencil

• Gum, ring magnets, and a doll

• String, pulley, and weight

• Battery, wire, and bulb

What causes the doll to spin in the magnetic force activity?

• Frictional force

• Electrostatic force

• Magnetic force

• Gravitational pull

What is the purpose of rubbing the straw on the tissue paper in the electrostatic force activity?

• To reduce air resistance

• To generate static electricity

• To create a magnetic field

• To increase friction

What happens to the paper when the charged straw is brought close to it?

• It falls to the ground

• It sticks to the straw

• It spins around the pencil

• It remains stationary

What is the main force acting on the paper helicopter when it is dropped?

• Magnetic force

• Electrostatic force

• Gravitational force

• Nuclear force

Why do objects always fall to the ground when thrown?

• Because of air resistance

• Due to electrostatic repulsion

• Due to gravitational force

• Because of magnetic attraction

What common characteristic do the three activities (magnetic, electrostatic, and gravitational) share?

• They all demonstrate non-contact forces

• They all involve contact forces

• They all require electricity

• They all use magnets

Which force is responsible for keeping us grounded on Earth?

• Electrostatic force

• Nuclear force

• Magnetic force

• Gravitational force