TEST BANK WITH VERIFIED ANSWERS
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‣ What are vectors? Answer: Quantities that have a magnitude and a
direction
‣ What are scalars? Answer: Quantities that only have a magnitude
‣ Examples of vectors Answer: Force
Velocity
Displacement
Acceleration
Momentum
‣ Examples of scalars Answer: Speed
Distance
Mass
Temperature
Time
‣ What are contact forces? Answer: Forces that act when two objects are
touching
,‣ What are non-contact forces? Answer: Forces that act without the need
for two objects to be touching
‣ Examples of contact forces Answer: Friction
Air resistance
Tension in ropes
Normal contact force
‣ Examples of non-contact forces Answer: Magnetic force
Gravitational force
Electrostatic force
‣ What is mass? Answer: The amount of material an object is made of
It is the same value everywhere
Measured using a mass balance
‣ What is weight? Answer: The force acting on an object due to gravity
It depends on the strength of the gravitational field at the location of the
object
Measured using a calibrated spring balance - newtonmeter
‣ Equation for Weight Answer: Weight (N) = Mass (kg) x Gravitational
Field Strength (N/kg)
,W=mg
‣ What is weight directly proportional to? Answer: Mass
‣ What are free body diagrams? Answer: Diagrams that show all the
forces acting on an object
‣ What is the minimum number of forces acting on an object in real
situations? Answer: At least 2 forces
‣ What is the resultant force? Answer: The single force that replaces
multiple forces acting at a single point
‣ How is work done? Answer: When a force moves an object through a
distance, energy is transferred and work is done on the object
‣ Equation for 'Work Done' Answer: Work done (J) = Force (N) x
Distance (m)
W=Fs
‣ What is 1J equal to? Answer: 1Nm
‣ What could happen when you apply a force to an object? Answer: It
may stretch, compress or bend
, ‣ What happens when an object is inelastically deformed? Answer: The
object won't return to its original shape and length after the force has
been removed
‣ Equation for Force 1 Answer: Force (N) = Spring Constant (N/m) x
Extension (m)
F=ke
‣ What is extension directly proportional to? Answer: The force applied
F∝e
‣ The stiffer the spring... Answer: ...The greater the spring constant
‣ What is the limit of proportionality? Answer: The point at which
extension is no longer directly proportional to force
‣ Equation for 'Moments' Answer: Moment of a force (Nm) = Force (N)
x Distance (m)
M=Fd
‣ What is a moment? Answer: The turning effect of a force
‣ When will an object not turn? Answer: When the object is balanced -
the total anticlockwise moment equals the total clockwise moment about
a pivot