Understanding Simple Machines

What is the primary purpose of simple machines?

• To make tasks more difficult

• To increase the amount of work done

• To make work more efficient and easier

• To reduce the need for energy

Which of the following is NOT a type of simple machine?

• Pulley

• Motor

• Incline plane

• Lever

What is another term used for input force in simple machines?

• Resistance

• Load

• Effort

• Output

In the context of simple machines, what does the term 'resistance' refer to?

• Output force

• Friction

• Input force

• Energy loss

What is the formula for work in physics?

• Force times displacement

• Force plus displacement

• Force divided by displacement

• Displacement divided by force

How does a lever make work easier?

• By increasing the input force

• By reducing the need for displacement

• By decreasing the output force

• By allowing a smaller input force over a larger displacement

What principle do simple machines attempt to conserve?

• Mass

• Energy

• Momentum

• Velocity

What is the ideal mechanical advantage based on?

• Forces

• Displacements

• Energy

• Friction

What does actual mechanical advantage take into account that ideal mechanical advantage does not?

• Friction

• Energy

• Velocity

• Displacement

How is percent efficiency calculated in simple machines?

• AMA divided by IMA

• IMA divided by AMA

• Output force divided by input force

• Input force divided by output force