Review Questions Basic Science

It is done when a force applied and distance travelled by an object is the same direction.

• Energy

• Power

• Work

• Displacement

It is considered as energy at rest or stored energy.

• Chemical energy

• Kinetic energy

• Mechanical energy

• Potential energy

A worker does 1600 J of work to carry a load to a height of 8 m. What is the weight of the load?

• 20 N

• 400 N

• 200 N

• 12 800 N

It is the capacity to do work.

• Energy

• Power

• Work

• Machine

Which of the following is TRUE about simple machines?

• A pulley is used to lift a load.

• A wedge is used to cut things into pieces.

• A lever is used to lift up or lower down objects.

• A screw is used to move a load to a higher spot.

Lever has three parts name, fulcrum, load, and _________________.

• effort

• hand

• plane

• surface

Which of the following devices does not make use of the principle of a lever?

• Scissors

• Broom

• Bottle opener

• Knife

A simple machine that consists of two inclined planes.

• Lever

• Screw

• Pulley

• Wedge

A __________ is a simple machine that consists of a rope and grooved wheel.

• Pulley

• inclined plane

• Lever

• wheel and axle

A(n) __________ is a simple machine consisting of a sloping surface that connects lower and higher elevations.

• screw

• wedge

• lever

• inclined plane