Ch2_2
New Problems
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Make sure to calculate your answers in SI units unless specified otherwise .
1) The position
x
of an object as a function of time is given as
x
= +
t
+
t
2
. All quantities are understood to be quoted in
SI
units. What is the initial velocity
(see sheet 14 , 16)
? Indicate with a negative (positive) sign whether the acceleration is constant (not constant) for the given expression.
2)An object starting with
m/s
is under a constant acceleration of
m/s
2
over a distance of
m
. What is the final velocity
(see sheet 15 ,15' )
?
3) An object, initially at rest, falls under the influence of gravity (neglect air resistance) and reaches a speed of
m/s
. For how many seconds did it fall
(see sheet 19)
? Indicate with a positive (negative) sign whether with air resistance the fall time is smaller (larger) than without air resistance.
4) An object, initially at rest falls under the influence of gravity (neglect air resistance) a distance of
m
. How many
seconds
does it fall
(see sheet 19)
?
5) An object is tossed vertically downward from an
m
height and reaches the ground after
seconds
. What was the magnitude of its initial velocity from the toss
(
neglect air resistance
, see sheet 14)
?
6) An object is launched vertically upward with
m/s
. How high does it rise
(
neglect air resistance ,
see sheet 23'
)
?
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cannot resubmit answers
for the same Problem Set--you must use the 'New Problems' button first.