Understanding Newton's Laws of Motion

What happens to an object if no resultant force acts on it?

• It changes direction randomly

• It remains in its current state of motion or rest

• It stops moving immediately

• It accelerates indefinitely

What is the net force on an object if it continues to move at a constant velocity?

• Constantly changing

• Dependent on the object's weight

• Zero

• Equal to the object's mass

What is the acceleration of a 4 kg ball pushed with a net force of 8 newtons?

• 0.5 m/s²

• 2 m/s²

• 4 m/s²

• 8 m/s²

How do you calculate the net force acting on an object?

• Multiply mass by the speed of the object

• Subtract the object's weight from the gravitational force

• Add up all individual forces acting on the object

• Divide the mass by the object's acceleration

What does inertia refer to in the context of Newton's laws?

• The acceleration due to gravity on an object

• The speed of an object in motion

• The resistance of an object to changes in its state of motion or rest

• The force needed to keep an object moving

If a heavier object and a lighter object are pushed with the same force, which will have a smaller acceleration?

• Both will have the same acceleration

• The lighter object

• The heavier object

• It depends on the surface

Which of the following is an example of Newton's third law of motion?

• A ball rolling down a hill

• A ball pushing back when hit

• A rocket launching into space

• A car braking to a stop

An automobile you are riding in suddenly stops, but you continue to go forward.

• Newton's
  1st
  Law of Motion
• Newton's
  2nd
  Law of Motion
• Newton's
  3rd
  Law of Motion

What does Newton's First Law of Motion state?

• An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.

• For every action, there is an equal and opposite reaction.

• The force of gravity acting on an object is directly proportional to its mass.

Which of the following scenarios best illustrates Newton's First Law of Motion?

• A ball rolling down a hill speeds up.

• A car comes to a stop gradually when the brakes are applied.

• A book remains at rest on a table until someone moves it.

• A rocket launches off the ground when its engines fire.