Why don't we experience the strong and weak nuclear forces directly?
  • Because they are too weak
  • Because they act over very short distances
  • Because they act only in space
  • Because they cancel each other
What happens when forces are balanced?
  • The object moves faster
  • The object changes direction
  • There is no change in motion
  • The object stops immediately
A soccer ball at rest starts rolling when kicked. Which type of force caused the motion?
  • Field force
  • Contact force
  • Magnetic force
  • Frictional force
Which of the following actions increases friction?
  • Applying oil on surfaces
  • Making the surface smoother
  • Scattering sand on icy roads
  • Using lubricants
Two equal forces act in opposite directions on a box. What can you infer?
  • The box will move to the left
  • The box will move to the right
  • The forces are balanced, and the box stays still
  • The net force is not zero
If you were asked to design a racing car, how could you reduce friction?
  • Use rough tires
  • Apply oil or grease to moving parts
  • Make the car surface rough
  • Increase tire texture
Force is any action that can change the state of motion of an object.
  • True
  • False
The electromagnetic force is weaker than the gravitational force.
  • True
  • False
Contact forces act without physical contact between objects.
  • True
  • False
Unbalanced forces cause a change in the motion of an object.
  • True
  • False
Friction always acts in the same direction as motion.
  • True
  • False
Static friction is usually greater than kinetic friction.
  • True
  • False
Without friction, it would be difficult to walk or drive a car.
  • True
  • False
Field forces include gravity and magnetism.
  • True
  • False
Balanced forces always cause motion.
  • True
  • False
Reducing friction can be achieved by using lubricants.
  • True
  • False
Why is friction considered both useful and harmful?A student says: “Friction is not important in our daily life.”What do you think?
  • The student is right because friction slows us down.
  • The student is wrong because we need friction to walk and hold things.
  • The student is right because friction wastes energy.
  • The student is wrong because friction makes things slippery.
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