Forces and Newton's Laws of Motion

What happens to the net force when two equal forces act in opposite directions?

• The net force is 0 N when two equal forces act in opposite directions.

• The net force doubles in magnitude and acts in the direction of one of the forces.

• The net force is equal to the sum of the two forces acting in the same direction.

• The net force is equal to the difference between the two forces.

What is the difference between mass and weight?

• Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in Newtons (N).

• Mass is the force exerted by gravity on an object, while weight is the amount of matter in an object.

• Mass and weight are the same and can be used interchangeably in physics.

• Mass is measured in Newtons (N), while weight is measured in kilograms (kg).

What is the effect of unbalanced forces on an object?

• Unbalanced forces cause an object to remain at rest.

• Unbalanced forces cause an object to accelerate in the direction of the net force.

• Unbalanced forces have no effect on an object's motion.

• Unbalanced forces cause an object to move at a constant speed.

What is the definition of balanced forces?

• Balanced forces are two or more forces acting on an object that cancel each other out, resulting in a net force of 0 N.

• Balanced forces are forces that cause an object to accelerate in the same direction.

• Balanced forces are forces that increase the speed of an object without changing its direction.

• Balanced forces are forces that act on an object but do not affect its motion.

How do you calculate net force when multiple forces are acting on an object?

• Net force is calculated by vectorially adding all the forces acting on an object. If forces are in opposite directions, they are subtracted.

• Net force is the sum of the magnitudes of all forces acting on an object, regardless of direction.

• Net force is calculated by taking the average of all forces acting on an object.

• Net force is determined by the largest single force acting on the object.

What is the formula for calculating weight?

• Weight = mass + gravitational acceleration (W = m + g)

• Weight = mass × gravitational acceleration (W = mg)

• Weight = mass / gravitational acceleration (W = m / g)

• Weight = mass - gravitational acceleration (W = m - g)

What is the role of gravity in motion?

• Gravity is a force that repels objects away from each other.

• Gravity is a force that attracts objects toward each other, influencing their motion and causing objects to fall toward the Earth.

• Gravity has no effect on the motion of objects in space.

• Gravity only affects objects that are in motion.

What does Newton's Second Law state about the relationship between force, mass, and acceleration?

• The force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

• The acceleration of an object is directly proportional to the mass of the object and inversely proportional to the force applied.

• The force acting on an object is equal to the mass of the object divided by its acceleration (F = m/a).

• The mass of an object is equal to the force acting on it multiplied by its acceleration (m = F * a).

What is the unit of force in the International System of Units (SI)?

• Pound (lb)

• Newton (N)

• Joule (J)

• Pascal (Pa)

How does surface area affect air resistance?

• Larger surface area decreases air resistance.

• Larger surface area has no effect on air resistance.

• Larger surface area increases air resistance.

• Larger surface area only affects air resistance at high speeds.