AP Physics 1 - Unit 1 Progress Check
Rock X
is released from rest at the top of a cliff that is on Earth. A short time later, Rock Y
is released from rest from the same location as Rock X
. Both rocks fall for several seconds before landing on the ground directly below the cliff.
Frictional forces are considered to be negligible.
Which of the following graphs correctly shows the vertical velocity of rock X
as a function of time? Take the positive direction to be upward. - ANSVelocity
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|________\___________Time
Rock XX is released from rest at the top of a cliff that is on Earth. A short time later, Rock YY is
released from rest from the same location as Rock XX. Both rocks fall for several seconds
before landing on the ground directly below the cliff. Frictional forces are considered to be
negligible.
Which of the following graphs best represents the vertical displacement of Rock XX as a
function of time starting from immediately after the rock is released from rest? Take the positive
direction to be downward. - ANSVertical Displacement
|---
|)
|)
|)
|__________\_________________Time
Rock XX is released from rest at the top of a cliff that is on Earth. A short time later, Rock YY is
released from rest from the same location as Rock XX. Both rocks fall for several seconds
before landing on the ground directly below the cliff. Frictional forces are considered to be
negligible.
After Rock YY is released from rest several seconds after Rock XX is released from rest, what
happens to the separation distance S between the rocks as they fall but before they reach the
ground, and why? Take the positive direction to be downward. - ANSS increases because at all
times Rock X falls with a greater speed than Rock Y
Toy car WW travels across a horizontal surface with an acceleration of aw after starting from
rest. Toy car ZZ travels across the same surface toward car WW with an acceleration of az after
starting from rest. Car WW is separated from car ZZ by a distance d. Which of the following
pairs of equations could be used to determine the location on the horizontal surface where the
two cars will meet, and why? - ANSx=x0+v0xt+12axt2for car W, and x=x0+v0xt+12axt2 for car
Rock X
is released from rest at the top of a cliff that is on Earth. A short time later, Rock Y
is released from rest from the same location as Rock X
. Both rocks fall for several seconds before landing on the ground directly below the cliff.
Frictional forces are considered to be negligible.
Which of the following graphs correctly shows the vertical velocity of rock X
as a function of time? Take the positive direction to be upward. - ANSVelocity
|\
|\
|\
|\
|________\___________Time
Rock XX is released from rest at the top of a cliff that is on Earth. A short time later, Rock YY is
released from rest from the same location as Rock XX. Both rocks fall for several seconds
before landing on the ground directly below the cliff. Frictional forces are considered to be
negligible.
Which of the following graphs best represents the vertical displacement of Rock XX as a
function of time starting from immediately after the rock is released from rest? Take the positive
direction to be downward. - ANSVertical Displacement
|---
|)
|)
|)
|__________\_________________Time
Rock XX is released from rest at the top of a cliff that is on Earth. A short time later, Rock YY is
released from rest from the same location as Rock XX. Both rocks fall for several seconds
before landing on the ground directly below the cliff. Frictional forces are considered to be
negligible.
After Rock YY is released from rest several seconds after Rock XX is released from rest, what
happens to the separation distance S between the rocks as they fall but before they reach the
ground, and why? Take the positive direction to be downward. - ANSS increases because at all
times Rock X falls with a greater speed than Rock Y
Toy car WW travels across a horizontal surface with an acceleration of aw after starting from
rest. Toy car ZZ travels across the same surface toward car WW with an acceleration of az after
starting from rest. Car WW is separated from car ZZ by a distance d. Which of the following
pairs of equations could be used to determine the location on the horizontal surface where the
two cars will meet, and why? - ANSx=x0+v0xt+12axt2for car W, and x=x0+v0xt+12axt2 for car
