Wednesday

December 17, 2014

December 17, 2014

Number of results: 15,186

**physics**

To measure the height of a tree, you throw a rock directly upward, with a speed just fast enough that the rock brushes against the uppermost leaves and then falls back to the ground. If the rock is in the air for 2.1 s, how tall is the tree?
*September 7, 2010 by frank*

**Physics**

A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the man is initially 2.75 m above the level of the saddle. Please Show work!! I am completely lost!
*February 7, 2012 by Haroula*

**math**

(a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.
*March 14, 2011 by aj*

**Math**

A tree in the park makes a shadow on the ground at the same time the basketball post makes a shadow on the ground, as shown. If the height of the basketball post is 10 feet tall, and casts a 30 foot shadow, and the tree casts a 60 feet shadow, use properties of similar ...
*March 5, 2013 by Shelia*

**math**

an airplane is flying at a height of 2 miles above the level ground. the angle of depression from the plane to the foot of a tree is 15 degree. Find the distance that the plane must fly to be directly above the tree.
*February 2, 2013 by Anonymous*

**Physics**

A golfer has to hit a ball over a tree that is 12.0 meters high from 40.0 meters away. The ball is hit with speed v at an angle (-) to the horizontal. Neglect any effect due to air. The golfer hits the ball with an initial velocity 30 degrees to the horizontal. Calculate the ...
*February 7, 2013 by Emilea*

**Math**

I have this application that I cant figure out how to work. Please help without giving me the answer. A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a shadow that is 0.4 m long. How tall is the tree?
*May 21, 2008 by Angela*

**Algebra **

I am having a hard time with this problem 3. You are going to plant trees in your hilly backyard. Tree A is located at coordinates (1,2) and Tree B is located at (3,12). What is the slope of the hill between the two trees? Show how you arrived at your answer
*September 8, 2010 by Sydney*

**math**

A tree on a hillside casts a shadow 200 ft down the hill. If the angle of inclination of the hillside is 23 to the horizontal and the angle of elevation of the sun is 54, find the height of the tree. Please round the answer to the nearest integer.
*November 29, 2012 by amaa*

**Principal of Math**

a tree casts a shadow 29m long. at the same time the shadow cast b a 61cm tall statue is 82cm long. find the height of the tree. round results to the nearest unit.
*April 14, 2013 by Christine*

**Math**

A 6 ft person has a shadow 5ft long. A nearby tree has a shadow 30ft long. How tall is the tree?
*March 7, 2013 by Cody *

**math**

If a 30-meter pine tree casts a shadow of 30 meter, how far is the tip of the shadow from top of the tree?
*November 16, 2013 by Tresa*

**figue out this**

In many forest very little sunlight reaches the smaller plants who lived on the ground or the florest floor because the tall trees block the sunlight awy from the smaller plants.Which of the following young trees has the BEST chance to survive and reproduce in this forest? A.A...
*April 18, 2007 by Hot stuff*

**math**

Pete is standing 2 feet away from a mirror on the ground. Pete is 5 feet tall and can just see the top of the tree in the mirror from where he is standing. The mirror is 8 feet away from the base of the tree. how tall is the tree?
*January 29, 2013 by Anonymous*

**trig**

a tree growing on a hillside casts a 102-foot shadow straight down the hill. Find the vertical height of the tree if, relative to the horizontal, the hill slopes 15.0 degrees and the angle of elevation of the sun is 62.0 degrees.
*November 8, 2011 by jc*

**trig**

A tree on a hillside casts a shadow c ft down the hill. If the angle of inclination of the hillside is b to the horizontal and the angle of elevation of the sun is a, find the height of the tree. Assume a = 48°, b = 18° c = 235 ft. (Round your answer to the nearest whole ...
*November 29, 2012 by Anonymous*

**math**

A man 1.7m tall observe a bird on top of a tree at angle of elevation of 40degree. If the bird distance between the man's head and the bird is 25m, what is the height of the tree?
*April 23, 2012 by Kaylie*

**calc**

When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre, the yield decreases by 3 oranges per tree. Express the total yield of oranges per acre, Y , as a function of the number of trees planted per acre, x, if x < or equal ...
*December 2, 2013 by sara*

**Math**

The Recycling Department of a fast food chain is planning to have a Christmas Tree Making Contest in preparation of the upcoming Holiday Season. Part of the contest mechanics is to collect soft drinks tin cans and build a Christmas Tree out of the tin cans. If you want to join...
*September 9, 2014 by Ryzza*

**college aLGEBRA**

1. A toy manufactor needs a piece of plastic in the shape of a right triangle with the longer leg 1 cm more than the shorter leg. How long should the sides of the triangle be? a^2+b^2=c^2 x^2+(x+1)^2=(x+2)^2 x^2+x^2+2x+1= x^2+4x+4 2. Martha want to buy a rug for a room that is...
*June 15, 2009 by Angela---- pLEASE HELP ME*

**MATH**

A guy-wire is attached to a tree to help it grow straight. The length of the wire is 2 feet greater than the distance from the base of the tree to the stake. Find the length of wire. x + 2 x + 1 x how would i set this one up?
*September 30, 2008 by jennifer*

**Math**

The slowest mammal on Earth is the sloth. A sloth might move along a tree at a maximum rate of just 3 ^-1m each minute. At this rate, how long will it take a sloth to climb a tree that is 33 m tall?
*October 27, 2014 by Anon*

**Maths**

On Saturday Derek picked pears from 32 trees. His picked average of 17 pears per tree. Sunday he picked more pears averaging 12 pears per tree. Over the whole weekend he picked an average of 14 pears per tree. How many trees did Derek pick from on Sunday? Please help with this...
*July 25, 2013 by Melody*

**math-data management**

I have just started grade 12 U Data Management, and i do not understand tree diagrams. I need help with the following question: Draw a tree diagram representing the playoffs of eight players at the Australian open tennis tournament.
*February 3, 2007 by Sara*

**Calculus**

You are driving at 20 m/s when you notice a tree blocking the road, 30 meters ahead of you. It takes you half a second to react before slamming on the brakes. Your car decelerates at a constant 10 m/s2. How far does your car travel before stopping? Will you hit the tree?
*November 17, 2014 by Bre*

**counting outcomes**

in volleyball, you can volley, set, or spike. how many ways can your team make two plays? use tree diagram. thanks. a tree diagram would show 9 possible outcomes how to you do and count outcomes
*April 9, 2007 by dillon*

**math**

a 3ft tall boy casts a 4ft shawdow at the same time a tree casts a 72 foot shawdow using the pythagorean therem find the distance from the top of the tree to the tip of the shawdow
*December 19, 2011 by carly*

**physics**

a golfer hits a golf ball which is 30m high infront of a 20m high tree. the ball just passes over the top of the tree. what was the vertical component of the initial velocity of the ball?
*April 10, 2013 by amy*

**PLEASE HELP ME WITH MATH! *BEGS***

Is 4a^2-a-5 factorable? If so how do you factor it? Yes it is factorable. just make a factor tree and put all of it's factors! what is the answer to 30 on a factor tree
*January 23, 2007 by Judy*

**math**

If tree is broken 18 feet from its base. The top lands 24 feet from the base. How tall is the tree?
*April 22, 2014 by marcus*

**English**

What did the emperor ask Ma Lian to paint? 1. The emperor asked Ma Liang to paint a gold tree and a boat. 2. The emperor asked him to paint a gold tree and a boat. 3. He asked Ma Liang to paint a gold tree and a boat. 4. He asked him to paint a gold tree and a boat. (Which one...
*April 5, 2010 by rfvv*

**derivative**

q=(100/p+1)^2 - 1 what is q'? use the chain rule: q' = 2(100/p+1)(-100/(p^2)) i got q' = 2(100/(p+1))(-100(p+1)^-2 =-2000/(p+1)^3
*April 29, 2007 by Evan*

**Algebra**

An object which is dropped from 100 feet above ground falls according to the formula s = -16t^2 + 100, where s is the distance from ground level at time t. Which equation is equivalent to this formula? S-100 = t^2 ------- -16 S-100 = t^2 ------ 16 s - 100 = t^2 --- -16 or S-...
*April 26, 2011 by mary*

**college trig**

From a point on the ground a person notices that a 110-ft tree on top of a hill subtends an angle of 3°. If the angle of elevation to the bottom of the tree, represented by angle A in the figure below, measures 37°, find the height h of the hill
*March 26, 2010 by smith*

**Math Help **

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldnt use a table???
*March 20, 2014 by Annie*

**physics =(**

A person on a small, 7.00 meter high, hill aims a water-balloon slingshot straight at a friend hanging from a tree branch 4.00 meters above and 6.00 meters away. At the instant the water balloon is released at 7.00 m/s, the friend lets go and falls from the tree, hoping to ...
*December 12, 2009 by Jordan*

**Math**

1. A rangers tower is located 44m from a tall tree. From the top of the tower, the angle of elevation to the top of the tree is 28 degrees and the angle of depression to the base is 36 degrees. How tall is the tree? 2. An engineer determines that the angle of elevation from ...
*February 6, 2014 by Tsunayoshi*

**grade 9 science**

a student wants to estimate the population size and density of birch trees in a woodlot measuring 100 m by 100 m. On a diagram of the woodlot, she splits the area into a 10 by 10 grid and randomly selects 10 sample quadrants - (0,0), (1,4), (2,6), (3,9), (4,3), (5,5), (6,1), (...
*September 10, 2012 by d*

**Physics**

A monkey throws a banana horizontally from the top of a tree. The banana hits the ground 3.03 seconds later and lands d = 30.9 meters from the base of the tree. 1. What was the resultant velocity of the banana as it hit the ground? magnitude = ? m/sec. 2. What is the angle ?° ...
*October 3, 2014 by Mack K*

**Geometry**

a cat is stuck 15 feet up in a tree.to get it down,you will place a ladder 5 feet from the base of the tree.how tall must your ladder be in order to reach the cat? Round to the nearest foot
*January 16, 2013 by Lessley*

**Geometry**

A tree casts a shadow that is 70 feet long. At the same time a person is standing nearby who is 5 feet 6 inches tall and their shadpw os 60 inches long. What is the proportion and what is the height of the tree?
*January 27, 2013 by Doobert*

**Maths**

4. Tonya is 1.3 meters tall. She stands 7 meters in front of a tree and casts a shadow 1.8 meters long. How tall is the tree?
*November 12, 2014 by Tim *

**Mathematics**

A tree is "x"meters high. The angle of elevation of its top from a point P on the ground is 23degrees. Form another point Q, 10meters from P and in line with P and the foot of the tree, the angle of elevation is 32degrees. Find "x". (i need a way on how to do this. thanks)
*March 5, 2008 by anonymous*

**math**

PLEASE HELP ME. 1/5 of bees flew to a cherry tree, 1/3 flew to a clover tree, and 3 times the difference of these 2 numbers buzzed over to a stand of heather. 3 flew around the hive circling and protecting the bee community. The question is, how many bees were there altogether?
*August 23, 2011 by Laila*

**english**

for vague pronouns what is correct. when the car hit a tree, it made a terrible noise or the care made a terrible noise as it crashed into a tree?
*June 11, 2014 by me*

**physics**

A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is above the ground. What is the mass of the box?
*October 18, 2014 by anthony*

**physics**

A child throws a snowball with horizontal velocity of 18m/s directly toward a tree, from a distance of 9.0m and a height above the ground of 1.5m. if the time interval is 0.50s, at what height above the ground will the snow ballhit the tree
*July 8, 2010 by sofi*

**Math**

A tree casts a shadow 10 feet long. A 6-ft. man casts a shadow 4 ft. long. The triangle formed by the tree and its shadow is similar to the triangle formed by the man and his shadow. How tall is the tree?
*December 2, 2010 by Caitlin*

**math**

i have a question on homework that says, "a small tree was measured at 3.67 feet tall. it can grow to 25 times that hight. what is the tallest hight the tree can be expected to reach?" i know that i have to multiply but i cant remember how to multiply decimals. ...
*August 24, 2009 by bella*

**Physics**

A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 4.8 cm. Assuming the friction force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
*March 24, 2011 by Jay*

**find my grade average**

-10% of my grade *82 -20% of my grade *100% *100% *100% *100% *100% *100% *100% *100% *82% -30% of my grade none -40% of my grade *76% reply as soon as possible. thank you!!!!
*April 18, 2010 by magy*

**math**

A tree cast a 24 foot shadow at the same time a fence post 5 feet high cast a 4 foot shadow. How tall is the tree?
*February 1, 2012 by Rue Ann*

**trig**

a 6 foot tall man is standing near a tree on level ground .if the man shadow 4 feet long .how many feet tall is the tree?
*April 29, 2012 by diamond *

**math am i correct**

Add thirty-eight and nine tenths, five and fifty-eight hundredths, seven, and fifteen and eight tenths. 38 9/10 + 5 58/100 + 7 + 15 3890/100 + 558/100 + 7 + 15 4448/100 + 7 + 15 44 48/100 + 7 + 15 44 24/50 + 7 + 15 44 12/25 + 7 + 15 66 12/25
*July 29, 2009 by scooby91320002*

**Biology**

In pine, both the staminate and ovulate cones occur on the same tree, but not on the same branch. The ovulate cones are usually at the top of the trees, so that pollen from their own tree will not fall onto and fertilize the eggs. Why would this be an advantage?
*September 6, 2010 by Anonymous*

**kvb**

Sam hits a golf ball with a five-iron a distance of 120 m horizontally. A tree 45 m high and 35 m in front of Sam is directly in the path of the ball. Will the ball clear the tree if the ball makes a parabolic curve and has maximum height of 80 m?
*October 11, 2011 by veera*

**geometry**

Two observers are 200 feet apart,in line with a tree containing a birds nest.The anles of elevation to the birds nest are 30 degrees and 60 degrees.How far is each observer from the base of the tree? Please help me my assigment is due tommorrow!!!!!
*January 24, 2013 by ian*

**trig**

A bird at the top of a tree looks down on a field mouse at an angle of depression of 65°. If the field mouse is 30 meters from the base of the tree, find the vertical distance from the ground to the bird’s eyes. Round the answer to the nearest tenth.
*September 18, 2014 by Anonymous*

**calculus**

Suppose a tree on your land has a radius of 3 inches and increases in radius one-fourth inch a year. How many years, y, to the nearest tenth will it take for the volume of the tree to double? A. 2 years B. 3.6 years C. 6.1 years D. 6.2 years
*April 14, 2012 by Anonymous*

**Caculus**

y = 500/1+75e^-.625 x = egg mass y = number of tree (thousand) The function is show the forest defoliation1. Find the percent of forest defoliation if the egg mass are 100? (Using derivative) Thank you
*November 2, 2011 by alex*

**Economics**

Suppose consumers spent $42 million on Christmas trees last year when the average tree cost $30 and this year spend $42 million when the average tree costs $25. Assuming nothing else changed, this data suggests that a. consumers bought the same number of Christmas trees this ...
*January 19, 2010 by Rosa*

**measurement**

A tree in Melaine's yard is 35 feet tall. Melanie is 5 feet tall. The tree is how many times as tall as Helen?
*January 5, 2012 by stella *

**Geometry**

A woman is standing 48 ft away from a tree. The woman casts a shadow of 12 feet and the tree is 27 ft tall. How tall is the woman?
*February 3, 2012 by Baishali*

**science**

wat causes an apple to fall down from a tree a pulling force towards the tree or a pulling force towards the earth
*November 14, 2008 by Anonymous*

**math**

If I plant a 7 foot tall tree. The height (h) of the tree, in feet, after n years is given by the equation h + 4n + 7. In how many years will the height be 39 feet?
*March 21, 2013 by Sean*

**Pre-Algebra**

A student is 5 ft tall and casts a shadow 10 ft long. A nearby tree casts a shadow 60 ft long. Find the height h of the tree.
*December 15, 2014 by troi*

**Math check**

write the decimal as a fraction or a mixed number in simplest form 2.67 2.67/1× 100/100 = 267/100 267/100 = 2 67/100?
*December 4, 2013 by Gio *

**Need Math Help Please **

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldnt use a table???
*March 20, 2014 by Annie*

**dgh**

Two Trees are 150 m apart. From a point halfway between them, the angle of elevation of their tops is 15°and..? 15°, and 20°. a)How much taller is one tree than the other? b) Where would a person have to stand in order to have the angle of elevation to the top of each tree ...
*December 17, 2011 by pooi*

**trig**

From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the river.how wide is the river?
*February 17, 2011 by Sandy*

**maths**

A tree broke from a point but did not seperate. If the point from where it broke is 7 m above the ground and its top touches the ground at the distance of 24 m from its foot, find out the total hieght of the tree before it broke.
*January 11, 2010 by naina*

**Physics**

How many years would it take the planet to orbit the sun. How do you calculate. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Using Kepler's Law you find that the anser is 97^(1.5) years. You can estimate this without using a ...
*December 29, 2006 by Harry*

**math**

amy is 5 feet tall and casts a 4 foot shadow. the pine tree has an 8 foot shawdow. how tall is the pine tree
*May 23, 2011 by selena*

**Geometry**

A 3-ft vertical post casts a 24-in shadow at the same time a pine tree casts a 30-ft shadow. How tall is the pine tree?
*April 3, 2012 by Cassie*

**math**

how high is a tree that cast a 36ft shadow at the time a 12ft post cast a shadow which is 12 ft. how high is the tree hight
*November 14, 2014 by mleya *

**Math**

Will is five feet tall. He casts a 3 feet shadow at the same time that a tree casts a 9 feet shadow. Use similar triangles to find the height of the tree.
*November 29, 2012 by Lillia*

**math**

A 2 m tall person standing on the ground looks up at an angle of 34.0 o with the horizontal and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person, and the building is 51.0 m from the person
*January 15, 2013 by tim*

**math**

A 2 m tall person standing on the ground looks up at an angle of 34.0 o with the horizontal and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person, and the building is 51.0 m from the person
*January 15, 2013 by tim*

**Physical sciences(Mechanics)**

A tractor pulls a tree trunk across a horizontal piece of ground.If the force in the chain is 3000N and the chain forms an agle of 30 degrees with the ground,calculate:The forces with which the tree is pulled across the ground.
*February 3, 2014 by Confidence*

**Physics**

Jim was told by his grandfather that he buried a time capsule when he was a kid. The grandfather gave the map to Jim and asked him to find it. The map directs Jim to start from the tallest tree in the town. It says the following; "From the tree, walk 13m to the South." "Then ...
*February 9, 2012 by Steph*

**math**

what is 10% of 20% of 30% pf 100? 100 * .30 = 30 30 * .20 = 6 6 * .10 = .6 I hope thats what your looking for! Are these three separate questions? 10% = 0.10 x 100 = ?? 20% = 0.20 x 100 = ?? 30% = 0.30 x 100 = ?? Remember of means times. Or is it just one question? 0.10 x 0.20...
*January 29, 2007 by preston*

**physics!**

The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image...
*April 10, 2012 by Sarah*

**physics**

The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image...
*April 10, 2012 by linds*

**8th grade math**

if a person is 6 feet tall and casts a 9 foot shadow, how tall would the shadow of a 100 foot tall tree be?
*December 4, 2011 by liz *

**MATHH**

A tree is "x"meters high. The angle of elevation of its top from a point P on the ground is 23degrees. Form another point Q, 10meters from P and in line with P and the foot of the tree, the angle of elevation is 32degrees. Find "x". (Please don't give me the answer only.. I ...
*March 5, 2008 by Nazharia*

**Math Word problems**

A number of birds were in a tree. Half flew away. 6 more flew away, a quester of the birds remained. How many birds were originally in the tree.
*January 16, 2013 by April*

**Math Word problems**

A number of birds were in a tree. Half flew away. 6 more flew away, a quarter of the birds remained. How many birds were originally in the tree.
*January 16, 2013 by April*

**Math HELP!**

What is the height of the tree? Its a right angle triangle but its laying on its left side. The right side is 52 ft. the left side is 38 ft. The tree is standing as tall as the bottom. A. 64.4 ft. B. 35.5 ft. C. 37.4 ft. D. 90 ft. Is the answer A? Thanks
*October 22, 2014 by Anonymous*

**ela poems **

Tree at my window, window tree, My sash is lowered when night comes on; But let there never be curtain drawn Between you and me. Vague dream-head lifted out of the ground, And thing next most diffuse to cloud, Not all your light tongues talking aloud Could be profound. But, ...
*August 20, 2014 by Shay*

**English**

I have 100 dollars. I have 100 pounds. I have 100 pesos. I have 100 euros. I have 100 yen. I have 100 won. I have 100 yuan. (Are all correct? Don't we need to capitalize the first letter in each money name? What about the plural forms? Are all correct? Do we have to use '...
*June 8, 2009 by John*

**Physics please help!**

The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image...
*April 10, 2012 by linds*

**math**

A tree casts a shadow 8 ft long. A 6 ft man casts a shadow 4 ft long. The triangle formed by the tree and it's shadow is similar to the triangle formed by the man and his shadow. How tall is the tree?
*November 2, 2010 by Anonymous*

**Maths**

A full binary tree of height 4 has 15 nodes The 8 nodes at the bottom of the tree are called end nodes or leaf nodes. Two distinct end nodes are uniformly chosen. The expected length of the shortest path between them can be expressed as a/b, where a and b are coprime positive ...
*May 29, 2013 by HELP~*

**Chemistry**

Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
*December 5, 2013 by Mandy*

**Math**

Patrick plants 4 trees in his neigbor's yard. The shortest tree is 5.6 feet. The tallest tree is 11.2 feet. What is a reasonable total height of the trees that Patrick plants? A. 25ft B. 30ft C. 45ft D. 50ft
*January 3, 2012 by Mica*

**Math**

Patrick plants 4 trees in his neigbor's yard. The shortest tree is 5.6 feet. The tallest tree is 11.2 feet. What is a reasonable total height of the trees that Patrick plants? A. 25ft B. 30ft C. 45ft D. 50ft I got 33.6 so its B?
*January 3, 2012 by Mica*

**English Com**

Does this sentence have a dangling modifier ? Flying over the oak tree, the farmer saw the flock of birds that had damaged his crops. Yes. It reads as if the farmer were flying over the oak tree. Do you see why? =)
*November 10, 2006 by kimba*

**precalculus**

Two people standing 30 feet apart look east at the top of a tree. The first person looks up at an angle of 78 degrees. The second person looks up at an angle of 62 degrees. How tall is the tree (to the nearest foot)?
*December 6, 2009 by Annie*

**math**

Fill in the blanks y = 10x + 100 x y -20 ? -10 ? 0 ? 10 ? I don't see any blanks to fill in. Are they telling you values of y and asking you co compute x? Or vice versa? The spacing changed the format I had. the values for x are -20, -10, 0, 10 now I need to find the values ...
*July 7, 2007 by Bianca*

**physics- pls help me**

1. The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration -5.20 m/s2 for 4.45 s, making straight skid marks 62.5 m long ending at the tree. With what speed does the car then strike the tree? 2. A jet plane lands...
*October 7, 2009 by Dora*

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