What is the SI unit of force?

• Joules (J)

• Kilograms (kg)

• Newtons (N)

• Metres per second (m/s)

Which instrument is used to measure the magnitude (or size) of a force?

• Thermometer

• Force meter

• Balance scale

• Stopwatch

Which of the following is a non-contact force?

• Friction

• Buoyancy

• Air resistance

• Weight

What is the approximate value of the gravitational field strength (g) near the Earth's surface?

• 1.6 N/kg

• 9.8 N/kg

• 10 m/s

• 100 N

The formula for calculating weight is:

• W = m / g

• W = F / a

• W = m × g

• W = d / t

What is the weight of a 2 kg mass on Earth (using g = 10 N/kg)?

• 0.2 N

• 2 N

• 20 N

• 200 N

Which of the following forces always acts to oppose motion?

• Thrust

• Weight

• Friction

• Normal force

On a free-body diagram, a longer arrow represents:

• A slower force

• A force with a different direction

• A smaller force

• A bigger force

When the forces acting on an object are balanced, the resultant force is:

• Greater than zero

• Less than zero

• Zero

• Equal to the largest force

Newton's First Law of Motion is also known as the law of:

• Acceleration

• Inertia

• Action-Reaction

• Momentum