Geometric
Problems
To solve word problems involving geometric
shapes, write down the formula or formulas referred to in the problem. For
example, after reading ‘‘The perimeter of a rectangular room . . . ’’ write P =
2L + 2W. Then fill in the information given about the formula. For example,
after reading ‘‘The peri- meter of the room is 50 feet . . . ’’ write P = 50
and 50 = 2L + 2W. ‘‘Its width is two-thirds its length.’’ Write W = ⅔ L and 50 = 2L + 2W becomes 50 = 2L + 2(⅔ L).
Alfi Blog
April 21, 2026
Admin
Bandung Indonesia
Geometric
Problems
To solve word problems involving geometric
shapes, write down the formula or formulas referred to in the problem. For
example, after reading ‘‘The perimeter of a rectangular room . . . ’’ write P =
2L + 2W. Then fill in the information given about the formula. For example,
after reading ‘‘The peri- meter of the room is 50 feet . . . ’’ write P = 50
and 50 = 2L + 2W. ‘‘Its width is two-thirds its length.’’ Write W = ⅔ L and 50 = 2L + 2W becomes 50 = 2L + 2(⅔ L).
Examples
An object is tossed up in the air at the rate
of 40 feet per second. How long will it take for the object to hit the ground?
Alfi Blog
April 20, 2026
Admin
Bandung Indonesia
Examples
An object is tossed up in the air at the rate
of 40 feet per second. How long will it take for the object to hit the ground?
Example
An object is dropped from the roof of a
60-foot building. How longbmust it fall to reach a height of 28 feet?
In
the formula h = –16t2
+ v0t + h0, h0 is 60 and v0 is zero (because the
object is dropped). The object reaches a height of 28 feet when h = 28.
Alfi Blog
April 19, 2026
Admin
Bandung Indonesia
Example
An object is dropped from the roof of a
60-foot building. How longbmust it fall to reach a height of 28 feet?
In
the formula h = –16t2
+ v0t + h0, h0 is 60 and v0 is zero (because the
object is dropped). The object reaches a height of 28 feet when h = 28.
The
Height of a Falling Object
The height of an object dropped, thrown or
fired can be computed using quadratic equations. The general formula is h = –16t2 + v0t + h0,
where h is the object’s height (in feet), t is time (in seconds), h0 is the
object’s initial height (that is, its height at t = 0 seconds) and v0 is the
object’s initial velocity (that is, its speed at t = 0 seconds) in feet per
second. If the object is tossed, thrown, or fired upward, v0 is
positive. If the object is thrown downward, v0 is negative. If the
object is dropped, v0 is zero. The object reaches the ground when h =
0. (The effect of air resistance is ignored.)
Alfi Blog
April 18, 2026
Admin
Bandung Indonesia
The
Height of a Falling Object
The height of an object dropped, thrown or
fired can be computed using quadratic equations. The general formula is h = –16t2 + v0t + h0,
where h is the object’s height (in feet), t is time (in seconds), h0 is the
object’s initial height (that is, its height at t = 0 seconds) and v0 is the
object’s initial velocity (that is, its speed at t = 0 seconds) in feet per
second. If the object is tossed, thrown, or fired upward, v0 is
positive. If the object is thrown downward, v0 is negative. If the
object is dropped, v0 is zero. The object reaches the ground when h =
0. (The effect of air resistance is ignored.)
Work Problems
REVIEW
Solve work
problems by filling in the table below. In the work formula Q = rt (Q = quantity, r = rate,
and t = time), Q is
usually ‘‘1.’’ Usually the equation to solve is:
Alfi Blog
April 17, 2026
Admin
Bandung Indonesia
Work Problems
REVIEW
Solve work
problems by filling in the table below. In the work formula Q = rt (Q = quantity, r = rate,
and t = time), Q is
usually ‘‘1.’’ Usually the equation to solve is:
