REVIEW PACK BUNDLED QUESTIONS AND
ANSWERS
◉ Velocity. Answer: Speed in a specific direction
Vector quantity and must be expressed in both units of magnitude and
direction of motion.
◉ vector quantity. Answer: quantity describing the time rate of change
of an object's position
◉ Average velocity. Answer: V av = Vf + Vi
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2
◉ Acceleration. Answer: the rate of change in velocity over a period of
time.
Vector quantity
Expressed in terms of magnitude and direction
,Change in velocity
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Change in time
◉ Projectile motion. Answer: Display two types of motion
simultaneously
dx= Vxt
dx- horizontal distance
Vx- a function of velocity
t-time
◉ Vertical motion. Answer: d= 1/2 at^2 + Vit
◉ Force. Answer: a push or pull on an objet
◉ Newton's first law of motion. Answer: A body at rest will remain at
rest, and a body in motion will remain in motion with a constant
velocity, unless acted on by an unbalanced force.
, ◉ Newton's second law. Answer: an unbalanced force will cause
acceleration, and this acceleration is directly proportional the the
unbalanced force.
F=k(or m)a
F-force
k- the content of proportionality= the mass of the object
a-acceleration
If the mass is expressed in kilograms and the acceleration is expressed in
meters per second squared, the unit of force is referred to as Newton (N)
and is equal to the force necessary to accelerate a mass on one kilogram
one meter per second per second
w=mg
◉ Gravity. Answer: 9.8 m/ sec squared
◉ Newton's Third Law of Motion. Answer: For every action there must
be an equal and opposite reaction
◉ Friction. Answer: A force that opposes motion and is expressed in
newtons