Understanding Newton's Laws of Motion

Who published the three laws of motion in 1687?

• Nikola Tesla

• Isaac Newton

• Galileo Galilei

• Albert Einstein

What does Newton's first law, also known as the law of inertia, state?

• An object in motion stays in motion unless acted upon by an external force

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

• Force equals mass times acceleration

• Velocity of an object remains constant unless acted upon by an external force

What is the formula for calculating net force according to Newton's second law?

• F(net) = m+a

• F(net) = a/m

• F(net) = ma

• F(net) = m/a

How is the force of gravity calculated on an object?

• F(g) = m+g

• F(g) = m/g

• F(g) = g/m

• F(g) = mg

What does Newton's third law imply about forces?

• They are directly proportional to the objects' masses

• They occur in pairs with equal magnitude but opposite direction

• They can only be observed in a vacuum

• They are always in equilibrium

What is the normal force in relation to a surface?

• Parallel and opposite in direction

• Perpendicular and constant in magnitude

• Perpendicular and changes in magnitude

• Parallel and equal in magnitude

How does a reindeer manage to pull a sleigh forward according to Newton's third law?

• By exerting a force greater than gravity

• By reducing the normal force to zero

• By the sleigh exerting a lesser force backward

• By the ground pushing it forward with a force greater than the sleigh's pull

What does a free body diagram represent?

• Only the object in motion

• The net force acting on an object

• All forces acting on an object with their directions

• The object's acceleration

What is the tension force in a rope connected to a suspended box?

• Independent of the box's weight

• Half of the box's weight

• Double the box's weight

• Equal to the box's weight

How is the acceleration of a lift determined when it is heavier than its counterweight?

• By dividing the net force by the lift's mass

• By adding the lift's weight to the counterweight's force

• By multiplying the net force with the lift's mass

• By subtracting the lift's weight from the counterweight's force