Forces in Balance

Quiz by Gary

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15 questions
• Q1
What is the name of the force that acts at right-angles to an object in contact with a surface ?
Normal Force
Acceleratory force
Weight
Balanced force
45s
• Q2
What is the name of the forward force generated by an engine or propellor?
Lift
Normal
Thrust
Drag
45s
• Q3
What is another name for the force caused by air resistance?
Normal
Thrust
Lift
Drag
45s
• Q4
What is the name of the upward force generated by an aircraft’s wing or a helicopter’s rotor?
Lift
Friction
Drag
Thrust
45s
• Q5
What force occurs when two moving surfaces come into contact?
Drag
Weight
Friction
Thrust
45s
• Q6
What is the name of the force generated by the brakes on a vehicle?
Drag
Weight
Friction
Normal
45s
• Q7
When two forces are equal and opposite in direction on an object what will be the resultant force?
Equilibrium
Acceleration
Zero Newtons
Constant velocity
45s
• Q8
If a resultant force on an object is greater than zero what will happen to the motion of that object?
It will stay at a Constant velocity
It will accelerate
It will have Zero velocity
45s
• Q9
The best definition of a resultant force is?
A force which allows equilibrium to be obtained.
The result of adding all forces together.
The result of resolving forces in both directions.
A single force which replaces all the other forces after working out their interactions.
45s
• Q10
If a car accelerates what will happen to the size of the drag force?
Increases
No change
Decreases
45s
• Q11
If a plane is flying level and has a thrust force of 120KN and the drag force is 90KN what is the resultant force?
30KN forward
150KN backwards
30 KN backwards
120KN forwards
45s
• Q12
If a plane is accelerating downwards what can you say about the vertical forces?
Weight > Lift
Weight > Thrust
Lift > Weight
Thrust > Weight
45s
• Q13
If a motorbike is travelling at a constant 50 mph what can we say about the horizontal forces?
The drag force is zero
The thrust force is zero.
The resultant horizontal force is zero
The resultant horizontal force is greater than zero
45s
• Q14
If a car is accelerating what can we about the horizontal forces?
Drag < Thrust
Thrust = Drag
Thrust = Friction
Thrust < Drag
45s
• Q15
What forces act on a moving car?
Weight, drag and thrust.
Weight, normal, drag and thrust.
Weight, normal, friction, drag and thrust.
Thrust and drag
45s

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