Physics IGCSE Forces and Motion Quiz

What is the SI unit of force?

• newton (N)

• joule

• meter

• kilogram

What is the formula to calculate force?

• force = mass + acceleration

• force = mass / acceleration

• force = mass - acceleration

• force = mass x acceleration

What is the difference between mass and weight?

• Mass is the force exerted on an object due to gravity, while weight is the amount of matter in an object.

• Mass and weight are the same thing and can be used interchangeably.

• Mass is measured in pounds, while weight is measured in kilograms.

• Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.

Explain Newton's first law of motion.

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• An object will change its direction without any external force

• An object in motion will slow down and stop eventually

• An object at rest will start moving on its own

What is the net force acting on an object in equilibrium?

• undefined

• zero

• 10

• negative

Explain the concept of terminal velocity.

• The maximum velocity reached by a falling object when the force of gravity is balanced by the force of air resistance.

• The speed at which an object stops falling

• The rate at which an object accelerates when falling

• The velocity at which an object starts falling

What is the effect of air resistance on falling objects?

• Air resistance slows down the falling object.

• Air resistance has no effect on falling objects.

• Air resistance speeds up the falling object.

• Air resistance makes the falling object heavier.

A resultant force of 4.0N acts on an object of mass 0.50 kg for 3.0 seconds.

What is the change in velocity caused by this force?

• 4.0 m / s

• 6.0 m / s

• 12 m / s

• 24 m / s

Which property of an object cannot be changed by a force?

• mass

• motion

• shape

• size

A ball is dropped from a table-top. Air resistance may be ignored.

Which row describes the velocity and the acceleration of the ball at point X

• acceleration = constant; velocity = constant

• acceleration = constant; velocity = increasing

• acceleration = increasing; velocity = constant

• acceleration = increasing; velocity = increasing