Understanding Force and Motion

What is the definition of force?

• Force is the speed at which an object moves.

• Force is the energy required to lift an object.

• Force is the amount of mass in an object.

• Force is an interaction that causes an object to change its velocity.

What is the unit of force in the International System of Units?

• joule (J)

• newton (N)

• watt (W)

• pascal (Pa)

What is Newton's First Law of Motion?

• An object at rest will move if it is not observed.

• An object will always remain in motion unless it is stopped by friction.

• An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

• An object in motion will eventually come to rest without any external force.

How does mass affect the force required to accelerate an object?

• More mass means less force is needed for acceleration.

• Mass directly affects the force required to accelerate an object; more mass requires more force for the same acceleration.

• Mass has no effect on the force required to accelerate an object.

• Force is independent of mass when accelerating an object.

What is the formula for calculating force?

• F = m - a

• F = m / a

• F = m + a

• F = m * a

What is the difference between balanced and unbalanced forces?

• Unbalanced forces only act on stationary objects.

• Balanced forces do not change an object's motion, while unbalanced forces cause acceleration.

• Balanced forces always cause motion, while unbalanced forces do not.

• Balanced forces are stronger than unbalanced forces.

What is gravitational force?

• Gravitational force is the attraction between two masses.

• Gravitational force is the energy produced by a mass.

• Gravitational force is the force that keeps objects in motion.

• Gravitational force is the repulsion between two masses.

How does frictional force affect motion?

• Frictional force increases speed and enhances movement.

• Frictional force only acts in one direction, aiding motion.

• Frictional force opposes motion, reducing speed and preventing movement.

• Frictional force has no effect on motion whatsoever.

What is the role of tension in a rope during a tug-of-war?

• Tension only affects the speed of the game.

• Tension is irrelevant in determining the winner.

• Tension in the rope transmits the pulling force between teams and determines the winner.

• Tension prevents the rope from breaking during the game.

Can force be negative? If so, explain how.

• Yes, force can be negative.

• Force is always a positive value regardless of direction.

• Force cannot be negative under any circumstances.

• Negative force is a concept that doesn't exist in physics.