4.2 Forces and Motion [Mastery check]

A newton is equivalent to which of the following quantities?

• kg•m/s²

• kg•(m/s)²

• kg

• kg•m/s

The length of a force vector represents the ______ of the force

• direction
• magnitude
• type
• cause

A car moves along a level road.

The diagram shows all of the horizontal forces acting on the car.

Which statement is correct?

• The car is slowing down.

• The car is speeding up.

• The car is moving at a constant speed.

• The car is moving backwards.

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

• mass

• motion

• shape

• size

Diagram shows a boy is pulling a 50 kg box along a rough floor.

Which combination of forces F₁ and F₂ will produce an acceleration of 2 m s^-2?

• F1 : 100N F2 : 200N

• F1 : 200N F2 : 400N

• F1 : 300N F2 : 600N

• F1 : 400N F2 : 800N

Which of the following produces the largest acceleration when forces are applied on a block?

• 
• 
• 
• 

A push or pull exerted on an object, has direction and magnitude.

• velocity

• acceleration

• Force

• weight

What is 'drag' another name for?

• dressing up
• air resistance
• friction
• weight

Name two quantities that are vectors.

• force and speed
• speed and acceleration
• force and acceleration
• mass and weight

What are balanced forces?

• forces of the same size, in opposite directions
• the same size in the same direction
• forces in opposite directions
• forces at right angles to each other