3F - 1. Forces and Motion

What is the unit used for measuring forces?

• Kilogram (kg)

• Pascal (Pa)

• Joule (J)

• Newton (N)

What force is responsible for pulling objects towards the Earth?

• Gravity

• Friction

• Upthrust

• Air resistance

What happens to the resultant force when it equals zero?

• The forces are balanced

• The object stops moving

• The object moves faster

• The object accelerates

What is the formula to calculate weight?

• W = m/g

• W = m - g

• W = m + g

• W = mg

What type of force opposes motion?

• Gravity

• Friction

• Upthrust

• Thrust

What is the pressure formula?

• P = F/A

• P = A/F

• P = F + A

• P = F - A

What is the effect of increasing the mass of an object on its acceleration?

• Acceleration increases

• Acceleration decreases

• Acceleration remains the same

• Acceleration becomes zero

What is the centripetal force?

• Force that causes acceleration

• Force that opposes gravity

• Force that keeps an object moving in a circle

• Force that causes friction

What is static friction?

• Friction when an object is moving

• Friction that occurs in gases

• Friction that stops an object from moving

• Friction that occurs in liquids

What happens to an object's weight on the Moon compared to Earth?

• It increases

• It decreases

• It remains the same

• It becomes zero