6th Grade Science Assessment: Forces, Newton's Laws, and Simple Machines

Which of the following best describes a balanced force?

• A force that causes an object to move

• A force that causes an object to accelerate

• A force that causes an object to remain at rest

• A force that causes an object to change direction

Which of Newton's laws states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an unbalanced force?

• First Law of Motion

• Second Law of Motion

• Third Law of Motion

• Law of Universal Gravitation

Which of the following is an example of an unbalanced force?

• A book sitting on a table

• A soccer ball rolling on flat field

• A car accelerating on a straight road

• A person standing still

Which of Newton's laws states that the acceleration of an object depends on the amount of mass the object has and the size of the force acting on it?

• First Law of Motion

• Second Law of Motion

• Third Law of Motion

• Law of Universal Gravitation

Which of the following is an example of a simple machine?

• A bicycle

• A baseball

• A pencil

• A bookshelf

Which simple machine consists of a bar that pivots on a fixed point?

• Lever

• Pulley

• Wheel and Axle

• Inclined Plane

Which of the following is an example of a third-class lever?

• A seesaw

• A wheelbarrow

• A pair of scissors

• A fishing rod

Which simple machine is an inclined plane wrapped around a cylinder?

• Screw

• Wedge

• Pulley

• Wheel and Axle

Which of Newton's laws states that for every action, there is an equal and opposite reaction?

• First Law of Motion

• Second Law of Motion

• Third Law of Motion

• Law of Universal Gravitation

Which of the following is an example of a balanced force?

• A closed door

• Kicking a soccer ball

• Pulling a wagon uphill

• Sliding down a slide