# The table shows the height of an elevator above ground level after a certain amount of time. Let y stand for the height of the elevator in feet and let x stand for the time in seconds. Which equation models

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1. ## physics

You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0 m above the ground, it is travelling at 25.0 m/s upward. Use the work-energy theorem to find a) its speed just as it left the ground; b) its maximum height.

2. ## maths

the height above ground level i n meters of a missile launched vertically ,is given by h(t)=-16t3+100t .at what time is the missile 72mabove ground level ? (t is time in seconds)

3. ## Algebra

The water level, w, in feet, of a river after a rainstorm is a function of the time, t, in hours, since the storm began. The table below shows the water level readings collected at different times. Hours Since Storm Began (t) Water Level (w) 1 18.7 1.5

4. ## Precalculus

To estimate the height of a building, two students find the angle of elevation from a point (at ground level) down the street from the building to the top of the building is 33 degrees. From a point that is 300 feet closer to the building, the angle of

5. ## Math

The table shows the height of an elevator above ground level after a certain amount of time. Let y stand for the height of the elevator in feet and let x stand for the time in seconds. Which equation models the data below? Time (s) Height (ft) 10 235 20

6. ## Maths

The height above ground level in metres of a missile launched vertically, is given by h(t)=-16th^3+100t. At what time is missile 50m in above ground level?

7. ## physics

Superguy is flying at treetop level near Paris when he sees the Eiffel Tower elevator start to fall (the cable snapped). His x-ray vision tells him Lois LaTour is inside. If Superguy is 1.00 km away from the tower, and the elevator falls from a height of

8. ## Math

Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h = −16t 2 + h0, where h is measured in feet. Use this information to solve the problem. A ball is dropped from the top of a building 59 ft tall.

9. ## UTA

An object is thrown downward with an initial speed of 10 m/s from a height of 49 m above the ground. At the same instant, a second object is propelled vertically up from ground level with a speed of 29 m/s . At what height above the ground will the two

10. ## Algebra

The table shows the height above the ground of a helicopter taking off from the top of a building. What equation in point-slope form gives the helicopter’s height at any time? a. y − 9 =3/2(x − 3) b. y − 9 = 3(x − 3) c. y + 9 = 3(x + 3) d. y + 9

11. ## Physics

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer

12. ## Mathematics

The height above ground level in metres of a missile lanunched vertically, is given by h(t)=-16t^3+100t. at what time is the missile 50m above the ground level? [t is time in seconds]

13. ## Math000

The height (in meters) of a projectile shot vertically upward from a point 3 m above ground level with an initial velocity of 21.5 m/s is h = 3 + 21.5t − 4.9t2 after t seconds. (Round your answers to two decimal places.) (a) Find the velocity after 2 s

A ball is thrown vertically upwards From the top of a building of height 29.4 m and with an initial velocity 24.5 m/sec. If the height H of the ball from the ground level is given by H = 29.4 + 24.5t - 4.9t², then find the time taken by the ball to reach

15. ## Calculus

An observer is 23m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 15m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

16. ## PHYSICS

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer

17. ## Algebra 2

I need help making a table 3. One of the fireworks is launched from the top of a 70ft tall building with an initial upward velocity of 150 ft/sec. a. What is the equation for this situation? g=-32ft/s^2 b. When will the firework land if it does not

18. ## Maths

the height above ground level in metres of missile luanched verticaly ,given by h(t)=-16tcube plus 100 t,what is missile 72m above ground level?

19. ## math

an elevator is moving up at a rate of one meter per second. the elevator is now at the street level. when was the elevator five meters below street level? when will the elevator be 10 meters above street level?

20. ## Algebra

The function H(t) = -16t2 + vt + s shows the height H (t), in feet, of a projectile launched vertically from s feet above the ground after t seconds. The initial speed of the projectile is v feet per second. Part A: The projectile was launched from a

21. ## Calculus angle of elevation

An observer is 31m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 22m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

22. ## Algebra 2 pt 2

I need help making a table 3. One of the fireworks is launched from the top of a 70ft tall building with an initial upward velocity of 150 ft/sec. a. What is the equation for this situation? g=-32ft/s^2 b. When will the firework land if it does not

23. ## physics

A stone is thrown from a building of height 40m and reaches a maximum height of 49m from the ground. The stone strikes the ground at a distance of 10m from the foot of the building. find the angle of elevation from which the stone is projected. Assuming

24. ## algebra

A toy rocket is launched vertically from 5 feet above ground level with an initial velocity of 112 feet per second. The height h after t seconds is given by the equation: h(t) = -16t^2 + 112t + 5 How long will it take for the rocket to reach maximum

25. ## calculus

An observer is 20 m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 20 m horizontally from the observer (see figure). The angle of elevation of the elevator is the angle that the observer's line of sight

26. ## Physics

4. In a shopping mall, two elevators pass each other moving in opposite directions. Each elevator to the other is 10 m/s. What is the velocity of each elevator relative to a person standing on the ground? One elevator has a velocity of 5 m/s and the other

27. ## Math

A ball is tossed straight upward with an initial velocity of 80 ft per second from a rooftop that is 12 feet above ground level . The height of the ball in feet at time t seconds is given by h(t)= -16t^2 +80t+12 find maximum height above ground level the

28. ## physics

An object is thrown downward with an initial speed of 15 m/s from a height of 85 m above the ground. At the same instant, a second object is propelled vertically up from ground level with a speed of 29 m/s. At what height above the ground will the two

29. ## physics

In a large hotel, a fast elevator takes you from the ground floor to the 21st floor. The elevator takes 17 s for this trip: 5 s at constant acceleration, 7 s at constant velocity, and 5 s at constant deceleration. Each floor in the hotel has a height of

30. ## physics

The distance each floor of the office building is 3.0 m. Which table shows the total distance traveled and displacement of the elevator?

31. ## Physics

An 80 kg man stands in an elevator. What force does the floor of the elevator exert on the man if a) the elevator is stationary? b) the elevator accelerates upward at 2 m/s2? c) the elevator rises with constant velocity 4 m/s? d) while rising, the elevator

32. ## physics

It takes the elevator in a skyscraper 3.6 s to reach its cruising speed of 10 m/s. A 69 kg passenger gets aboard on the ground floor. 1.What is the passenger's weight before the elevator starts moving? 2.What is the passenger's weight while the elevator is

33. ## Calculus

An observer is 36m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 26m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

34. ## Physics

A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level.

35. ## Algebra

Neil gets in an elevator at the 30th floor and it begins to move downward at a speed of 8 feet per second. After 12 seconds the elevator is 240 feet above ground. a. Let y= the height in feet of the elevator 'x' secinds after Neil got in. Write an equation

36. ## physics

A stone is thrown straight up from the ground with an initial speed of 30.5 m/s . At the same instant, a stone is dropped from a height of h meters above ground level. The two stones strike the ground simultaneously.Find the height h. gravity is 9.8 m/s2 .

37. ## math

Suppose the height of the freight elevator in your building is half its width w when the doors are all the way open. a. What is an expression for the maximum side length of a sheet of metal that will fit through the elevator doors? b. If the height of the

38. ## math

Brad takes the bus to work. When he gets off at the bus station, on the ground level, he has to take the elevator down 3 floors and then take another elevator up 16 floors to his office. What is Brad's net gain in floors from where he got off the bus to

39. ## maths

in a building there are 9 floor above the ground level and 4 floors below the ground level if the ground level is represented by 0,what integer would best describe the floor 4 above the ground level?

40. ## Help:)

Can someone help me with this? Someone was helping, but I'm still confused! Amos gets in an elevator at the 30th floor and begins to move downward at a speed of 8 feet per second. After 12 seconds, the elevator is 240 feet above the ground. A.) Let y= the

41. ## physics

An elevator without a ceiling is ascending with a constant speed of 9.7 m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0 m above the elevator floor, just as the elevator floor is 25 m above the ground. The initial speed of the

42. ## Physical science

An elevator motor did 300,000 Joules of work lifting a freight elevator(mass=500.0kg). If this story is 5.0 m and the elevator started on the ground floor, what is the highest level it could reach?

43. ## physics

An elevator without a ceiling is ascending with a constant speed of 10m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0m above the elevator floor, just as the elevator floor is 28m above the ground. The initial speed of the

44. ## Science

The floors of a twenty storey building is spaced 2,2 m apart.An elevator stars at 08h00 on ground level with persons A and B .They go up to floor 17 and return immediately to floor 14 where A get out.B return to ground levele where he arrived at 08h03.what

45. ## Math

An elevator moves at a rate of -5.8 feet per second from a height of 300 feet above the ground. It takes 3 seconds for the elevator to make its first stop. How many feet above the ground is the elevator now?

46. ## physics

An elevator is travelling upwards at 15m/s2 and the hoisting cable is cut when it is 40 m from the ground. Determine the maximum height reached by the elevator & the velocity just before it hits the ground.

47. ## what is the rate of change of the angle of eleva

An observer is 20 m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 20 m horizontally from the observer (see figure). The angle of elevation of the elevator is the angle that the observer's line of sight

48. ## Algebra

A stunt man drops from the top of a 50 foot elevator shaft. His height above ground is determined by the equation h=-16(t)(t)+50. At the moment the stunt man begins to drop, an elevator goes up so that its height above ground is determined by the equation

49. ## Algebra

A stunt man drops from the top of a 50 foot elevator shaft. His height above ground is determined by the equation h=-16(t)(t)+50. At the moment the stunt man begins to drop, an elevator goes up so that its height above ground is determined by the equation

50. ## physics

2. A ball is thrown vertically upward from the 15m level in an elevator shaft with an initial velocity of 20 m/s. At the same instant an open-platform elevator passes the 6m level, moving upward with a constant velocity of 2 m/s. Determine a. When and

51. ## Physics

A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level.

52. ## Calculus angle of elevation with elevator

An observer is 20m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 18m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

53. ## Physics

A grain bucket conveyor (grain leg) raises soybeans from the ground level up to the peak of its height, h= 150 ft. A bushel of soybean weight, W=60 lb/bu. The bucket elevator can deliver, Q= 120 bu/min, to the top spout. The motor shaft power to drive the

54. ## physics

A baseball is hit at ground level. The ball reaches its maximum height above ground level 2.6 s after being hit. Then 2.1 s after reaching its maximum height, the ball barely clears a fence that is 96.4 m from where it was hit. Assume the ground is level.

55. ## Physics

A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.2 s after being hit. Then 2.7 s after reaching its maximum height, the ball barely clears a fence that is 81.0 m from where it was hit. Assume the ground is level.

56. ## Pre-Algebra

The biggest attraction at the new amusement park, World of Fun, is the huge slide that goes under the ground. To get to the top of the slide, Jon has to climb up a 56-foot ladder. Then he rides the slide to the bottom. Finally, Jon walks through a tunnel

57. ## math

A parking garage has floors above and below ground level. For a scavenger hunt, galas friends are given a list of objects they need to find on the third floor and fourth level below ground, the first and fourth above ground, and ground level. a. If ground

58. ## Pre-Algebra

The biggest attraction at the new amusement park, World of Fun, is the huge slide that goes under the ground. To get to the top of the slide, Jon has to climb up a 56-foot ladder. Then he rides the slide to the bottom. Finally, Jon walks through a tunnel

59. ## physics

The single cable supporting an unoccupied elevator breaks when the elevator is at rest at the top of a 155 m high building. With what speed does the elevator hit the ground?

60. ## Math/Physics

A golf ball is struck at ground level. The speed of the golf ball as a function of the, where t = 0 at the instant the ball is struck and intial velocity is 31 m/s. The golf ball hits the ground when t = 2.5 and v = 19, and then v increases as the ball

61. ## equations

you decide to ride ann elevator until it takes you to the ground floor withour pushing any buttons the elevator takes you up 4 floors down 6 floors up 1 floor down eight floors down 3 floors up 1 and then down six floors to ground level on what floor did

62. ## physics

a ball thrown veticallyupwards from ground level hits the ground level hits the ground after 4s. calculate the maximum height it reached during its journey.

63. ## physics

A fireman d = 35.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 28.0° above the horizontal. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the stream of

64. ## Algebra 1

A parking garage has floors above and below ground level. For a scavenger hunt, galas friends are given a list of objects they need to find on the third floor and fourth level below ground, the first and fourth above ground, and ground level. Question A .

65. ## Physics

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer

66. ## Physics

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer

67. ## Physics

A classmate throws a 1.1-kg book from a height of 1.3 m above the ground straight up into the air. The book reaches a maximum height of 4.0 m above the ground and begins to fall back. Assume that 1.3 m above the ground is the reference level for zero

68. ## calculus

An elevator starts from the first floor upwards. The height h in meters above the first floor after t seconds can be determined by the connection. a) The elevator stops when the speed is zero. How high is the elevator then? b) What is the acceleration of

69. ## Physics

An elevator is lifted up by a thick steel cable. While the elevator is moving upwards with a decreasing velocity, a. the upward force on the elevator by the cable is greater than the downward force of the Earth b. the amount of upward force due to the

70. ## math

A kite which is flying at a height of 215 m above the ground level descends at the rate of 5m per minute . Find its height from the ground after 30 minutes

71. ## Math

A clown was shot out of a cannon at ground level. Her height above the ground at any time (t) was given by the function h(t) = -15t2 + 15t What was height at t(1), t(2),and t(3)? The flight will last how many seconds??

72. ## Science

A Ball Thrown Vertically Upwards From Ground Level Hit The Ground After 4s Calculate The Maxium Height During This Height

73. ## Physics

An 80 kg man stands in an elevator. What force does the floor of the elevator exert on the man if a) the elevator is stationary? b) the elevator accelerates upward at 2 m/s2? c) the elevator rises with constant velocity 4 m/s? d) while rising, the elevator

74. ## physics

An object is thrown downward with an initial speed of 5 m/s from a height of 78 m above the ground. At the same instant, a second object is propelled vertically from ground level with a speed of 50 m/s. The acceleration of gravity is 9.8 m/s2. At what

75. ## Physics

An object is thrown downward with an initial speed of 17 m/s from a height of 96 m above the ground. At the same instant, a second object is propelled vertically up from ground level with a speed of 22 m/s. At what height above the ground will the two

76. ## maths

an elevator descends at the rate of 8m/min.if the descent starts from 5m above the ground level,how much time will it take to reach -475m ?

77. ## physics

A stone is thrown straight up from the ground with an initial speed of 26.6 m/s. At the same instant, a stone is dropped from a height of "h" (a variable) meters above ground level. The two stones strike the ground simultaneously. Find the height "h" (a

78. ## Physics

A table can be modeled as a flat block supported by four identical legs. If the mass of the top block is 10 kg and each leg is a uniform rod with height of 1m and mass of 5 kg. Find the gravitational potential energy of the table. Take the ground as the

79. ## math

Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h=−16t^2+h0, where h is measured in feet. If a ball is dropped from 48 feet above the ground, how long does it take to reach ground level?

80. ## chemistry

Using a periodic table, determine the number of electrons held in energy levels 1-3 of each atom. B----2 in level 1--3 in level 2--0 in level 3 C--2 in level 1--4 in level 2--0 in level 3 Mg--2 in level 1--8 in level 2--2 in level 3

81. ## Math

the table shows the wind pressure on a structure at different heights in pa. using linear interpolation, estimate the pressure at a height of 17 ft. 6 in the table is below: height(ft) pressure(pa) 13 254 14 269 15 278 16 287 17 296 18 311 19 319 20 326

82. ## Physics

An 80 kg man stands in an elevator. What force does the floor of the elevator exert on the man if a) the elevator is stationary? b) the elevator accelerates upward at 2 m/s2? c) the elevator rises with constant velocity 4 m/s? d) while rising, the elevator

83. ## physics

It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 11m/s . A 70kg passenger gets aboard on the ground floor. What is the passenger's weight before the elevator starts moving? What is the passenger's weight while the elevator is

84. ## math

An elevator descends at a rate of 4.5 feet per second. If the elevator begins its descent from a height of 360 feet, at what height will it be after 17 seconds?

85. ## Physics

how to solve this? the answer key says 10 floors (11 + the ground floor) An elevator starts from rest at the ground floor of the building. It experiences an acceleration a=0.500m/s^2 and reaches a velocity of 5.48m/s. What is the floor reached by the

86. ## Physics

A classmate throws a 1.1-kg book from a height of 1.3 m above the ground straight up into the air. The book reaches a maximum height of 4.0 m above the ground and begins to fall back. Assume that 1.3 m above the ground is the reference level for zero

87. ## Maths

The first one iswhat angle does a 3.8m ladder make with the ground, if it reaches 2.1m up the wall? The second one is A concreter uses a ramp to wheelbarrow in sand from the ground level to floor level inside a building under construction. Floor level is

88. ## maths

at a fairground, the table shows the prbability of winning an amount on a spinner. what is the minimum amount that can be charged to make profit from the game? amount 5p 10p 20p 50p prbability 0.5 0.25 0.15 0.1 can you show how you worked it out? thanks

89. ## science

Juggle and bangles are clowns.juggles stands on one end of a teeter-Ritter at rest on the ground.bangles jumps off a platform 2.5m above the ground and lands on the other end of the teeter-totter,launching juggles into the air.juggles rises to a height of

90. ## Physics

A stone A is dropped from the top of a very high platform. At the same time another stone is thrown vertically upward from the ground level with an initial speed of 50m/s. At the instance that the stone passes each other, the ration of the velocities of A

91. ## cal

A ball is thrown directly upward from ground level with an initial velocity v(0) = 96 ft=s. Assuming that the ball’s only acceleration is that due to gravity (i.e., a(t) = ��32 ft=s2), determine the maximum height reached by the ball and

92. ## Physics

At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 57 m horizontally and h = 73 m vertically above the launch point. At the instant it reaches its maximum height above ground level, what is its horizontal

93. ## math

Brad takes the bus to work. When he gets off at the bus station, on the ground level, he has to take the elevator down 2 floors and then take another elevator up 14 floors to his office. What is Brad's net gain in floors from where he got off the bus to

94. ## Math

From a platform an object is projected vertically into air. Its height, h metres above ground level after t seconds is modelled by equation h=3+20t-5t^2. At what height above the ground is the platform from which the object was projected? Calculate the

95. ## Physics

An elevator cable breaks when a 950 kg elevator is 23 m above a huge spring (k = 2.3×105 N/m) at the bottom of the shaft. (a)Calculate the work done by gravity on the elevator before it hits the spring. (b) Calculate the speed of the elevator just before

96. ## Physics

Two balls of different masses are set at a height of 3 m above the ground on a frictionless table. The ball on the left is of mass 2M and the ball on the right has a mass of 3M. They both are released simultaneously and slide onto the part of the table 2 m

A ball is thrown vertically upwards From the top of a building of height 29.4 m and with an initial velocity 24.5 m/sec. If the height H of the ball from the ground level is given by H = 29.4 + 24.5t - 4.9t², then find the time taken by the ball to reach

98. ## Math

I am having a little trouble figuring this problem out if someone could help I would appreciate it. Question: The angle of elevation to the top f a tree sighted from ground level is 19degrees. If the observer moves 60 ft closer, the angle of elevation from

99. ## physics

Juggles the clown stands on one end of a teeter-totter at rest on the ground. Bangles the clown jumps off a platform 2.5 m above the ground and lands on the other end of the teeter-totter, launching Juggles into the air. Juggles rises to a height of 3.7 m

100. ## physics

Juggles the clown stands on one end of a teeter-totter at rest on the ground. Bangles the clown jumps off a platform 2.7 m above the ground and lands on the other end of the teeter-totter, launching Juggles into the air. Juggles rises to a height of 3.8 m