Mechanics Pre-Test

According to Newton's First Law of Motion, an object at rest tends to stay at rest unless acted upon by what?

• friction

• internal force

• gravity

• external force

Which type of force is responsible for keeping an object moving in a circular path?

• Centrifugal force

• Tangential force

• Inertial force

• Centripetal force

If a car accelerates from 20 m/s to 40 m/s in 5 seconds, what is its acceleration?

What type of friction occurs when an object moves through a fluid like air or water?

• Fluid resistance

• Fluid friction or drag

• Liquid friction

• Aerodynamic drag

What is the product of an object's mass and velocity called?

• Speed

• Momentum

• Acceleration

• Inertia

When a ball is thrown into the air, what type of energy transformation occurs at the highest point of its trajectory?

• Potential energy to kinetic energy

• Kinetic energy to potential energy

• Thermal energy to sound energy

• Chemical energy to electrical energy

In which type of lever is the load between the fulcrum and the effort?

• First-class lever

• Fourth-class lever

• Third-class lever

• Second-class lever

What is the SI unit of force?

• Pascal (Pa)

• Watt (W)

• Joule (J)

• Newton (N)

What is the force that opposes the motion of objects sliding against each other?

• traction

• resistance

• friction

• slipperiness

Which law of motion states that for every action, there is an equal and opposite reaction?

• Einstein's theory of relativity

• Boyle's law

• Newton's third law of motion

• Archimedes' principle