Simple machines: levers

What pulls objects towards the center of the Earth?

• Earth's gravity

• Magnetic forces

• Friction

• Air resistance

What is needed to lift the child off the ground?

• More weight on the other end of the seesaw

• Less weight on the other end of the seesaw

• Equal weight on both ends of the seesaw

• No weight on the other end of the seesaw

In a seesaw, where is the fulcrum located?

• At one end of the seesaw

• In the middle of the seesaw

• At the point where the load is applied

• At the point where the effort is applied

What is the function of the load arm in a lever?

• It is the fixed point at which the lever pivots

• It is the section of the beam between the fulcrum and the load

• It is the section of the beam between the fulcrum and the effort force

• It is the force applied to the lever

What does the term "effort arm" refer to in a lever?

• The fixed point at which the lever pivots

• The section of the beam between the fulcrum and the load

• The section of the beam between the fulcrum and the effort force

• The force produced by the lever

What is a lever?

• A type of simple machine that consists of a fulcrum, a load arm, and an effort arm

• A type of complex machine that consists of a fulcrum, a load arm, and an effort arm

• A type of simple machine that consists of a fulcrum, a load arm, and a pivot arm

• A type of complex machine that consists of a fulcrum, a load arm, and a pivot arm

Which of the following best describes the function of a fulcrum in a lever?

• It is the section of the beam between the fulcrum and the load

• It is the section of the beam between the fulcrum and the effort force

• It is the fixed point at which the arms of a lever pivot or rotate

• It is the force applied to the lever

What is a force multiplier in the context of levers?

• A lever with an effort arm that is longer than the load arm.

• A lever with an effort arm shorter than the load arm.

• A lever with equal effort and load arms.

• A lever that does not require any effort force.

What is a speed multiplier in the context of levers?

• A lever with an effort arm that is longer than the load arm.

• A lever with an effort arm shorter than the load arm.

• A lever with equal effort and load arms.

• A lever that does not require any effort force.

What is a positive aspect of a force multiplier lever?

• Less effort force is needed to move the object.

• The load moves faster than the input motion.

• The effort force needs to be greater than the load force.

• You must move the effort arm down over a large distance.