Sample Problems.
1. What is the acceleration of a vehicle that changes its velocity from
100km/h to a dead stop in 10 s?
2. What is the instantaneous velocity of a freely falling object 10 s after it
is released from a position of rest? What is its average velocity during
this 10s interval? How far will it fall during this time?
3. A car takes 10 s to go from
v
= 0m
/
s to
v
= 25m
/
s at approximately
constant acceleration. If you wish to ﬁnd the distance traveled using
the equation
d
=
1
2
at
2
, what value should you use for
a
?
4. A reconnaissance plane ﬂies 600 km away from its base at 200 km/h,
then ﬂies back to its base at 300 km/h. What is its average speed?
5. A car travels along a certain road at an average speed of 40 km/h and
returns along the same road at an average speed of 60 km/h. Calculate
the average speed for the round trip. (
Don’t say 50 km/h!
)
6. What is the acceleration of a 40kg block of cement when pulled side
ways with a net force of 200 N?
7. What is the acceleration of a 20kg pail of cement that is pulled upward
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 Spring '08
 MODI
 Acceleration, Force, Mass, Velocity, Centimetre gram second system of units

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