Which simple machine is a rigid bar pivoted about a fixed point — select the correct answer.

✅ A. Watt

Power is measured in watts. Read more

✅ A. Lever

A lever is a rigid bar that rotates around a fulcrum. Read more

✅ D. 3 × 10^8 m/s

Light travels in vacuum at approximately 3 × 10^8 meters per second. Read more

✅ C. Convex lens

A convex lens is thicker at the center and converges parallel light rays. Read more

✅ A. Energy

The joule is the SI unit of energy and work. Read more

✅ D. Lever

A lever is a rigid bar that rotates around a fulcrum. Read more

✅ B. Ohm

Electrical resistance is measured in ohms. Read more

✅ A. Energy

The joule is the SI unit of energy and work. Read more