Force, mass and weight

Which of the following is the correct unit of force?

• kilogram

• pound

• newton

• pascal

Which of the following is NOT an effect of a force on an object?

• it can change an object's mass

• it can change an object's size

• it can change a moving object's direction

• it can slow down a moving object

Which of the following words best describes the main force acting in this picture?

• gravitational

• electrostatic

• magnetic

• upthrust

Which of the following best describes the force labelled 'A'?

• applied force

• upthrust

• gravitational

• normal

Which of the following best describes the force labelled 'B'?

• applied force

• weight

• friction

• normal

Which of the following best describes the force labelled 'C'?

• applied force

• weight

• gravitational

• normal

Which of the forces below can best be described as a contact force?

• gravitational

• magnetic

• electrostatic

• friction

A student steps on to a bathroom scale. The pointer stops at '45', and the students makes the statement:

"My weight is 45 kilograms."

Is the student's statement correct or incorrect?

• correct

• incorrect

Which of the following is closest in value to the gravitational field strength, g, on Earth?

• 0.98 N/kg

• 9.8 N/kg

• 98.0 N/kg

• 980 N/kg

An astronaut of mass 60 kg visits planet X.

The gravitational field strength, g, on planet X is 2 N/kg.

What is the astronaut's weight on planet X?

• 62 N

• 600 N

• 100 N

• 120 N