Newton’s Laws of Motion Introduction Quiz

Who discovered the laws of motion and gravity?

• Galileo Galilei

• Johannes Kepler

• Albert Einstein

• Isaac Newton

What does Newton's first law state when there is no force acting on an object?

• The object changes direction

• The object remains at rest

• The object moves at a constant speed

• The object accelerates

What is needed to change the speed or direction of a spacecraft in space?

• Momentum

• Gravity

• Thrust

• Friction

What is the effect of applying more force to an object according to Newton's second law?

• The object slows down

• The object decreases in mass

• The object accelerates more

• The object stops moving

According to Newton's third law, what is the direction of the reaction force applied to an object?

• The reaction is at an angle

• There is no reaction

• The reaction is in the opposite direction

• The reaction is in the same direction

What does Newton’s second law describe?

• The relationship between force and acceleration

• The relationship between mass and velocity

• The relationship between speed and time

• The relationship between energy and motion

What is the force that decreases with distance and mass according to Newton's law of universal gravitation?

• Magnetic force

• Frictional force

• Gravitational force

• Electrical force

What force is responsible for keeping a satellite in orbit around the Earth?

• Thrust

• Friction

• Gravity

• Momentum

Newton used his laws of motion and universal gravitation to substantiate ____________ laws of planetary motion.

• Galileo's

• Einstein's

• Copernicus's

• Kepler's

According to Newton's third law, what is the result of a spacecraft firing a thruster rocket?

• The rocket comes to a halt

• There is no reaction

• The gas moves in the opposite direction of the rocket

• The rocket moves in the same direction as the gas