# A person kicks a rock off a cliff horizontally with a speed of 20.0 m/s. It takes 7.0 seconds to hit the ground, find: a. height of the cliff b. final vertical velocity c. horizontal range

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1. ## Physics 11th grade 2

1) A 20 kg rock is on the edge of a 100 m cliff. a. What potential energy does the rock possess relative to the base of the cliff? b. The rock falls from the cliff. What is the kinetic energy just before it strikes the ground? c. What speed does the rock

2. ## Physics

rock is thrown downward from the top of a cliff with an initial speed of 12 m/s, disregarding air resistance if the rock hits the ground after 2.0 s, what is the height of the cliff

3. ## physics

A person standing on a vertical cliff a height h above the lake wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the shore .The person realizes that with a running start it will be possible

4. ## Math

For this problem, a person standing on the edge of a cliff throws a rock directly upward. it is observed that 2 secs later the rock is at its maximum height (in feet) and that 5 secs after that (meaning 7 seconds after being thrown) the rock hits the

5. ## PHYSICS HELP

A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 31 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s . a.Assuming that air resistance can be ignored, find the initial speed of the rock . v0=

6. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 14 m/s. The cliff is h = 39 m above the water's surface. (a) How long does it take for the stone to fall to the water? (b) With what speed does it strike the

7. ## physics

A person standing on a vertical cliff a height h above the lake wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the shore .The person realizes that with a running start it will be possible

8. ## physics

A 17-kg rock is on the edge of a 103-m cliff. (a) What potential energy does the rock possess relative to the base of the cliff? . J (b) The rock falls from the cliff. What is its kinetic energy just before it strikes the ground? J

9. ## Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 20 m/s. The cliff is h = 53 m above the water's surface, as shown below. (a) How long does it take for the stone to fall to the water? (b) With what speed

10. ## physics

a soccer player kicks a rock horizontally off a 40.0-m-high cliff into a pool of water. if the player hears the sound of the splash 3.00 s later, what was the initial speed given to the rock? assume the speed of sound in air to be 343m/s.

A rock of mass 5kg is pushed over the edge of a cliff which is 200m high 1.ignore air resistance and calculate the speed of the rock at the bottom of the cliff. In reality air resistance cannot be ignored. The rock eventually reaches terminal velocity of

12. ## Physic

A ball is thrown horizontally from a cliff at a speed of 15 m/s and strikes the ground 45 meters from the base of the cliff. How high was the cliff (rounded to the nearest meter)

13. ## phicis

a rock is dropped from a cliff and reaches the ground in 2.70s . At the same time another rock is thrown horizontally from the same height with initial x velocity of 0.95 m/s. what distance will in x will the second recover?

14. ## Physics

A soccer player kicks a rock horizontally off the a 40 m high cliff into the pool of water. if the player hears the sound of the splash 3 sec., what is the initial speed given to the rock? Assume the speed of the sound in air to be 343 m/s.

15. ## physics

c) A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff the rock has the speed of 29 m/s. Assuming that the air resistance can be ignored, find i. the initial speed of the

16. ## Physics

A boy kicks a rock off a cliff with a speed of 15.5m/s at an angle of 53.5° above the horizontal. The rock hits the ground 5.37s after it was kicked. How high is the cliff? I found the height of the cliff which is 7.45*10^1 m. What is the speed of the

17. ## Physics

A person, standing on a vertical cliff a height h above a lake, wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the bottom of the cliff. The person realizes that with a running start it will

18. ## Physics

A rock is thrown horizontally off of a cliff. It starts with a velocity of 4.2 m/s and the cliff is 68.2 m high. How long does the rock fall? I got 3.7 seconds but I do not know if it is right. (Help on these two) How far out from the bottom of the cliff

19. ## physics

a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 ms. The cliff is 52m above the waters surface. How long does it take for the stone to fall to the water? With what speed does it strike the water?

20. ## physics

A balloon carrying a basket is descending at a constant velocity of 20.0 m/s. A person in the basket throws a stone with an initial velocity of 15.0 m/s horizontally perpendicular to the path of the descending balloon, and 4.00s later this person sees the

21. ## Physics

A person kicks a rock off a cliff horizontally with a speed of 20.0 m/s. It takes 7.0 seconds to hit the ground, find: a. height of the cliff b. final vertical velocity c. horizontal range

A rock is thrown horizontally off of a cliff. It starts with a velocity of 4.2 m/s and the cliff is 68.2 m high. How long does the rock fall? I got 3.7 seconds but I do not know if it is right. (Help on these two) How far out from the bottom of the cliff

23. ## Science

You throw a rock horizontally off a cliff with a speed of 10 m/s. after 3.1 seconds, how far were you when threw the rock?

24. ## physics

A 17-kg rock is on the edge of a 103-m cliff. (a) What potential energy does the rock possess relative to the base of the cliff? 1 . J (b) The rock falls from the cliff. What is its kinetic energy just before it strikes the ground? 2 . J (c) What speed

25. ## Differential Calculus

a person standing at the edge of a cliff throws a rock directly upward. it observed that 2 seconds later, the rock is it maximum height and that 5 seconds after it reached the highest point, it hits the ground at the base of the cliff. what is the initial

26. ## Physics

PLEASE HELP! A person throws a rock horizontally off a cliff ata a speed of 9 m/s from a point 64.8 m above the ground. How long is the rock in the air? 13.2 s 26.4 s 3.64 s(my guess) 5.14 s A package falls from an airplane in level flight at constant

27. ## physics

A rock is thrown from a cliff top at 18m/s, 25 degrees above the horizontal. It lands on the beach 4.2 seconds later. a) What is the height of the cliff? b) Hor far from the base of the cliff did the rock land?

28. ## Physics

A rock is dropped from a sea cliff 400m high.If the speed of sound is a constant 330 m/s, how long after the rock is dropped is the sound of the splash heard at the top of the cliff?

29. ## Physics

A boy kicks a rock off a cliff with a speed of 19.4 m/s at an angle of 52.5° above the horizontal. The rock hits the ground 5.41 s after it was kicked. a) How high is the cliff? (I found the height to be 60.3 m) b) What is the speed of the rock right

30. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 13 m/s. The cliff is h = 58 m above the water's surface, as shown below. (a) How long does it take for the stone to fall to the water? s (b) With what speed

31. ## Math

A person standing near the edge of a cliff 120 feet above a lake throws a rock upward with an initial speed of 40 feet per second. The height of the rock above the lake at the bottom of the cliff is a function of time and is described by the function H(t)

32. ## Science

A motorcyclist is trying to leap across the canyon by driving horizontally off the cliff at a speed of 38.0 m/s, height of the first cliff=50m, second cliff=30m.Ignoring the air resistance, find the speed with which the cycle strikes the ground on the

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 35 m high. When it hits the ground at the base of the cliff the rock has a speed of 28 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b)

34. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 47 m above the water's surface, as shown below.

35. ## physics

A person is standing 100 feet from a tall cliff. She throws a rock 80 feet per second at an angle of 45 degrees. Neglecting air resistance and assuming the person is 6 feet tall, does the rock strike the cliff? If so, how far up the cliff does it hit?

36. ## Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 23 m/s. The cliff is h = 54 m above the water's surface. How long does it take for the stone to fall to the water? With what speed does it strike the water?

37. ## Physics

a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 10 m/s. the cliff is 48 m above the water's surface as shown. how long does it take for the stone to fall to the water? the acceleration of gravity is 9.81 m/s2.

38. ## Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 12 m/s. The cliff is 52 m above the water’s surface, as shown. 12 m/s 52 m How long does it take for the stone to fall to the water? The acceleration of gravity

39. ## Chemistry

rock is thrown downward from the top of a cliff with an initial speed of 12 m/s, disregarding air resistance if the rock hits the ground after 2.0 s, what is the height of the cliff

40. ## physics

Multiple part question….. A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0m above a flat, horizontal beach. With what angle of impact does the stone land (in degrees). A

41. ## Physics

1. A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and (b) the average speed. 2. A boy kicked a can horizontally from a 6.5 m high rock with a speed of

42. ## physics

A 3.5 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.88 kg of water is raised

43. ## physics

A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 20.6 m above the top of the cliff before falling to the base of the cliff, landing 6.54 s after it was thrown. How high is the cliff?

44. ## physics

A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 20.6 m above the top of the cliff before falling to the base of the cliff, landing 6.44 s after it was thrown. How high is the cliff?

45. ## MacArthur physics

. A person kicks a rock off a cliff horizontally with a speed of 20 m/s. It takes 7.0 seconds to hit the ground, find: a) height of the cliff b) final vertical velocity c) range

46. ## physics

A person kicks a rock off a cliff horizontally with a speed of 20 m/s. It takes 7.0 seconds to hit the ground, find: a) height of the cliff b) final vertical velocity c) range

47. ## physics

A soccer player kicks a rock horizontally off a cliff 42.9 m high into a pool of water. If the player hears the sound of the splash 3.16 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

48. ## physics

A soccer player kicks a rock horizontally off a 40.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.04 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

49. ## physics

A soccer player kicks a rock horizontally off a 41.7 m high cliff into a pool of water. If the player hears the sound of the splash 3.08 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

50. ## Physics

A person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with a speed of 14.3 m/s. The cliff is 47.6 m above the water's surface. How far in meters from the base of the cliff does the stone land?

51. ## Physics

A person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with a speed of 14.3 m/s. The cliff is 47.6 m above the water's surface. How far in meters from the base of the cliff does the stone land?

52. ## physic

Question Part Points Submissions Used A soccer player kicks a rock horizontally off a 41.7 m high cliff into a pool of water. If the player hears the sound of the splash 3.11 s later, what was the initial speed given to the rock? Assume the speed of sound

53. ## physics

A rock is thrown off a vertical cliff at an angle of 58.6o above horizontal. The cliff is 84.6 m high and the ground extends horizontally from the base. The initial speed of the rock is 21.8 m/s. Neglect air resistance. To what maximum height, in meters,

54. ## Physics

a person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with speed of 31 m/s cliff is 51 m above water. how far from base of cliff does stone land and what is speed of stone when it hits water

55. ## Physics

A rock is thrown horizontally off of a cliff. It starts with a velocity of 4.2 m/s and the cliff is 68.2 m high. How far out from the bottom of the cliff does the rock fall? ﻿﻿ 57m﻿ 59m ﻿ 63m ﻿ 45.8m ﻿

56. ## physics

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff the rock has a speed of 28 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b)

57. ## PHYSICS

A 0.26kg- rock is thrown vertically upward from the top of a cliff that is 32m high. When it hits the ground at the base of the cliff, the rock has a speed of 29m/s. 1) Assuming that air resistance can be ignored, find the initial speed of the rock ? m/s

58. ## physics

A 15 kg rock is horizontally from very high cliff at a speed of 65m/s. what is the speed of the rock after it has fallen a vertical distance of 35m?

59. ## Physics

A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 32 m/s . Part A Assuming that air resistance can be ignored, find the initial speed of the rock.

60. ## physics

a rock is thrown horizontally with a speed of 17 m/s from a vertical cliff of height 34 m. A- I solved for t=2.63 B-How far will it land from the base of the cliff? im using x=xo+vox*t i get -6.46 and it is wrong. What am I doing wrong? C-What is the

61. ## physics

REPOST PLEASE HELP a rock is thrown horizontally with a speed of 17 m/s from a vertical cliff of height 34 m. A- I solved for t=2.63 B-How far will it land from the base of the cliff? im using x=xo+vox*t i get -6.46 and it is wrong. What am I doing wrong?

62. ## Physics

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 27 m high. When it hits the ground at the base of the cliff the rock has a speed of 24 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b)

63. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 13 m/s. The cliff is h=37 m above the water's surface, as shown below. With what speed does it strike the water?

64. ## physics

A person standing at the top of a hemispherical rock of radius R = 5.00 m kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity vi. (a) What must be its minimum initial speed if the ball is never to hit the rock after it is

65. ## physics

a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 m/s. the cliff is 52 m above the waters surface. how long does it take for the stone to fall to the water? with what speed does it strike the water. vi= +18 m/s

66. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18m/s. The cliff is 52 meters above the waters surface. How long does it take for the stone to fall to the water? with what speed does it strike the water?

67. ## phys

10. A rock is thrown upwards from the top of a 45 m tall cliff with an initial speed of 15 m/s. (a) What is the maximum height reached by the rock? (b) For what total time is the rock in the air before it strikes the ground at the base of the cliff?

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 13 m/s. The cliff 42 m above the water’s surface With what speed does the stone strike the water? Answer in units of m/s..

69. ## physics

an archer at the edge of a cliff fires an arrow from a height of 14.6 m above the ground at the bottom of the cliff. the arrow just clears a rock on a pillar that is 21.7 m above the gound which is 45.2 m horizontally away from the archer.determine a,the

70. ## physics

an archer at the edge of a cliff fires an arrow from a height of 14.6 m above the ground at the bottom of the cliff. the arrow just clears a rock on a pillar that is 21.7 m above the gound which is 45.2 m horizontally away from the archer.determine a,the

71. ## physics!

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18m/s. The cliff is 52m aboce the water's surface. How long does it take for the stone to fall to the water? With what speed does it strike the water? I got how

72. ## physics

A 76 kg rock is rolling horizontally at the top of a vertical cliff that is 20m above the surface of lake.the top of the vertical face of the dam is located 100m from the foot of the cliff with the top of the dam level plain is 25m below the top of the

73. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 16 m/s. The cliff is h = 60 m above the water's surface, as shown below. How long does it take for the stone to fall to the water? With what speed does it

74. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 16 m/s. The cliff is h = 60 m above the water's surface, as shown below. (a) How long does it take for the stone to fall to the water? s (b) With what speed

75. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 m/s. The cliff is 52 m above the water's surface. How long does it take for the stone to fall to the water? With what speed does it strike the water?

A rock of mass 5kg is pushed over the edge of a cliff which is 200m high 1.ignore air resistance and calculate the speed of the rock at the bottom of the cliff. In reality air resistance cannot be ignored. The rock eventually reaches terminal velocity of

77. ## Physics- displacement, velocity, etc.

25. Maria is standing at the edge of a cliff that is 10 m high over a canyon. She throws a rock upward off the side of the cliff. Right before the rock reaches the canyon floor, it has a speed of 25 m/s. a) What was the rock’s total displacement? 10

78. ## norma

A person standing at the edge of a seaside cliﬀ kicks a stone over the edge with a speed of 12 m/s. The cliﬀ is 41 m above the water’s surface, How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s 2 .

79. ## Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 12 m/s. The cliff is 59 m above the water’s surface, as shown. How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s

80. ## Physics

A person standing at the edge of a seaside cliﬀ kicks a stone over the edge with a speed of 21 m/s. The cliﬀ is 52 m above the water’s surface. How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s^2.

81. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 55 m above the water's surface, as shown below. How long does it take for the stone to fall to the water?

82. ## Physics

An astronaut is stranded on another planet with UNKNOWN GRAVITY. He conducts two experiments. In the first, he drops a rock from a cliff and he finds that it takes the rock 4.15 seconds to reach the ground at the base of the cliff. In the second

83. ## physics 1

An astronaut is stranded on another planet with UNKNOWN GRAVITY. He conducts two experiments. In the first, he drops a rock from a cliff and he finds that it takes the rock 4.15 seconds to reach the ground at the base of the cliff. In the second

84. ## physics

A child standing on the edge of a sheer cliff wall throws a rock down towards the ground below. The rock is thrown 67° below the horizontal at a speed of 22 m/s & lands 43 m from the base of the cliff wall. Ignore air drag. A.) Determine how long the rock

85. ## Gweedo8

a man stand on a 100 m cliff and throws a rock with speed of 40ms at 42degrees above horizontal. what time before rock hits ground. the horizontal distance the rock traveled from base of cliff.? my answer is 4.08 sec before rock hits ground 81.6 m distance

86. ## Physics Honors

A rock is thrown horizontally from a cliff overlooking the ocean. If the cliff is 45 meters high and the rock is thrown at 18 m/s, what is the angle at which it strikes the ocean?

87. ## physics

A 3.5 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.88 kg of water is raised

88. ## Physics

A 2.6 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.98 kg of water is raised

89. ## Physics

A person runs off a cliff. The person runs with a speed of 10 m/s and is moving to the right as he leaves the cliff. The cliff is 13 meters above a pool of water. a) Determine the acceleration of the person after leaving the cliff (x and y components). b)

90. ## physics

A large rock is dropped from a plane flying horizontally at an altitude of 4.00 x 10 ^3 ( to the power of 3) and with a speed of 900km h. a) calculate the distance that the rock will move horizontally before hitting the ground b) find the velocity of the

91. ## physics

To estimate how high the cliff is you throw a rock off the edge and 7.8 s later you hear the rock hit the ground. The speed of sound is 330 m/s. Ignoring air resistance how high is the cliff?

92. ## College Physics

A rock is thrown from the top of a cliff. It lands 2.33 seconds later 17.3 meters from the base of the cliff. How far did it drop vertically? What is the speed of the rock when it lands?

93. ## physics

A rock is thrown upwards from the top of a 100m cliff, on the way down the rock misses the edge of the cliff and continues falling to the ground. What is the distance that the rock travelled?

94. ## PHYSICS

looking over the edge of a cliff, you become curious as to how high up you are. you take a rock and drop it over the edge and count. The rock strikes the ground in between 3 and 4 of your count. so let's estimate that it took 3.5s for it to hit the ground.

95. ## Science

A rock is held steady over a cliff and dropped. 1.1 seconds later, another rock is thrown straight down at a speed of 12.1 m/s, and hits the first rock. How far have the rocks dropped before they collide? How long is the first rock in the air before it

96. ## physics

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18 m/s. the cliff is 50 m above a flat, horizontally beach. how long after being released does the stone strike the beach below the cliff?

97. ## pyhsics

A man drops a rock off the side of a cliff, and hears it hit the bottom 2.8 seconds later. If the average speed of sound is 335 m/s, how high is the cliff? I have been able to figure out this much, but I don't know how to solve the problem with the data

98. ## Physics

1.You are stuck on a cliff and want to know how far to the bottom. You drop a rock and time how long it takes to hit the ground. If the rock takes 10 seconds to hit the ground how high is the cliff? How fast was the rock going to impact? 2. You throw a

99. ## physics

a rock is thrown at a downwards angle of 15 degrees from the top of a 120 m cliff with a speed of 25 m/s. what will be its speed when it strokes the ground at the base of the cliff? I know to use the conservation of energy but I don't know how to set it

100. ## Physics

A diver runs along a horizontal cliff top of a large lake. She makes contact with the water 1.40 s after leaving the cliff and her contact point is 3.2 m horizontally outward from the edge of the cliff. a. What is her speed as she leaves the cliff? b. How