Newton's Three Laws of Motion - Revision

A force is a push or a pull on an object that results from its interaction with another object.

• True

• False

Answer explanation

The statement is true because a force is indeed a push or a pull that occurs due to the interaction between objects.

Only large objects with mass have gravity.

• True

• False

Answer explanation

Gravity is a fundamental force that affects all objects with mass, regardless of size. Therefore, the statement that only large objects with mass have gravity is false.

The combined force of all forces acting on an object is the  ___ force.

• net

• big

• bad

• use

Answer explanation

The net force is the combined force of all forces acting on an object. It is the vector sum of all forces, taking into account both magnitude and direction.

When the forces acting upon an object are UNBALANCED , the object will ____

• stay still

• move

• bounce

• fly

Answer explanation

When the forces acting upon an object are unbalanced, the object will move due to the resulting net force causing acceleration.

Acceleration is a change in _____

• velocity

• cars

• school

• me

Answer explanation

Acceleration is a change in velocity, not in cars, school, or oneself. It refers to the rate of change of velocity over time.

Newton's second law is applied as the formula _____

• Force = Mass X Acceleration

• Speed = distance / time

• a + b = c

• huh?

Answer explanation

Newton's second law states that Force equals Mass multiplied by Acceleration, so the correct formula is Force = Mass X Acceleration.

The SI units for force are...

• Kilograms

• Newtons

• Meters per second

• Pounds

Answer explanation

The SI units for force are measured in Newtons, making it the correct choice among the options provided.

Which of the following explains the difference between speed and velocity?

• One has motion, and the other does not.

• One has direction, and the other does not.

• One involves time, and the other does not.

• One involves acceleration, and the other does not.

Answer explanation

Speed is a scalar quantity with no direction, while velocity is a vector quantity that includes direction.

Acceleration is caused by a force acting on a mass.

• Newton’s first law of motion

• Newton’s second law of motion

• Newton’s third law of motion

Answer explanation

Acceleration is caused by a force acting on a mass, which is described by Newton's second law of motion.

For a force on an object there is an equal and opposite force.

• Newton’s first law of motion

• Newton’s second law of motion

• Newton’s third law of motion

Answer explanation

The correct choice is Newton’s third law of motion, which states that for every action, there is an equal and opposite reaction.