Newtons 3 Laws

Who published the three laws of motion in 1687?

• Albert Einstein

• Galileo Galilei

• Isaac Newton

• Nikola Tesla

What does 'normal force' refer to?

• The force that is perpendicular to the surface on which an object rests

• The force that keeps an object in motion

• The force that an object exerts on itself

• The force that always acts downward

What is inertia?

• The resistance of any physical object to a change in its state of motion

• The rate of acceleration due to a force

• The tendency of an object to keep doing what it's doing

• The force of gravity on an object

How can a reindeer pull a sleigh according to Newton's laws?

• By pulling the sled with a force equal to its weight

• By reducing the force of gravity

• By increasing its mass

• By exerting a force on the ground that propels it forward

What is a free body diagram?

• A sketch of the movement of an object over time

• A diagram showing the gravitational force on an object

• A diagram showing all the forces acting on an object

• A detailed drawing of the shape and dimensions of an object

What does it mean if the net force on an object is 0?

• The object is moving at a constant speed

• The object is accelerating

• The object is losing mass

• The object is in equilibrium

What does Newton's third law state?

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

• The force of gravity is 9.81 m/s^2

• An object at rest stays at rest

• Force equals mass times acceleration

According to Newton's second law, the net force is equal to:

• mass / acceleration

• velocity / time

• mass x acceleration

• mass x velocity

What is the formula to calculate the force of gravity?

• F(g) = m+a

• F(g) = m/v

• F(g) = ma

• F(g) = mg

What units are used to measure weight?

• Newtons

• Pounds

• Meters per second squared

• Kilograms