1. Physics

    A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. What is the vertical velocity of this motion?
  2. physics

    A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. What is the vertical velocity of this motion?Select one of the options below as your answer: A. 18.3 meters/second B.
  3. physics

    A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds.
  4. physics

    A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds.
  5. physics

    A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds.
  6. physics

    A projectile MUST____. List all that apply. a) experience a net downward force b) have a constant speed c) be accelerating d) be changing its velocity e) be moving downward f) have a horizontal motion in addition to a vertical motion
  7. physics

    A projectile MUST____. List all that apply. a) experience a net downward force b) have a constant speed c) be accelerating d) be changing its velocity e) be moving downward f) have a horizontal motion in addition to a vertical motion
  8. Physics

    A train moving at a constant speed on a surface inclined upward at 10.0° with the horizontal travels a distance of 400 meters in 5 seconds. Calculate the vertical velocity component of the train during this time period.
  9. Physics

    A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 55.0 kg, and the hill is inclined at 16.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs
  10. Physics

    A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 85.0 kg, and the hill is inclined at 19.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs
  11. Physics

    A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car
  12. Physics (acceleration)

    1. Jasmine rode a horse down a path headed north. she started from rest and then accelerated at 0.5 m/s2 for 12 seconds and then travelled at a constant speed for 28 seconds. a.) what was her velocity after 12 seconds? b.) what was jasmines displacement
  13. Physics

    A rock dropped from a small bridge encounters no air resistance and hits the pond below 1.0 s later. If it had been thrown horizontally with a speed of 10m/s , then it would have hit the water A. more than 1.0s later, since it has a greater distance to
  14. Physics

    a 2 centimeter diameter ball of 50 grams rolls at constant velocity across a table. it takes 4 seconds to travel 3 meters. Sketch graph of horizontal position, velocity and acceleration.
  15. physics

    A Martian rover is moving up a hill sloped at 30.0° with the horizontal. If it has a constant velocity of 1.50 meters/second, calculate its vertical displacement after 21.0 seconds.
  16. Physics

    A Martian rover is moving up a hill sloped at 30.0° with the horizontal. If it has a constant velocity of 1.50 meters/second, calculate its vertical displacement after 21.0 seconds.
  17. physics

    A Martian rover is moving up a hill sloped at 30.0° with the horizontal. If it has a constant velocity of 1.50 meters/second, calculate its vertical displacement after 21.0 seconds
  18. physics

    projectile motion with constant horizontal speed ? A stone falls off a cliff with horizontal velocity v m/s. it falls a distance of 5cm vertically and 200m horizontally in t seconds. when it has fallen a vertical distance of 20cm, what is its horizontal
  19. Physics

    A car accelerates from rest at 5 m/s^2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5 m/s^2 to come to rest. The entire journey takes 25 seconds. Plot the velocity-time graph of the motion. They don't give me a
  20. Physics

    A plane, diving with constant speed at an angle of 52.0° with the vertical, releases a projectile at an altitude of 790 m. The projectile hits the ground 6.00 s after release. (Assume a coordinate system in which the airplane is moving in the positive
  21. Physics

    A plane, diving with constant speed at an angle of 52.0° with the vertical, releases a projectile at an altitude of 790 m. The projectile hits the ground 6.00 s after release. (Assume a coordinate system in which the airplane is moving in the positive
  22. Projective Motion Problem

    Darryl Strawberry hits a baseball with a horizontal velocity of 45 m/s and a vertical velocity of 25 m/s... Find the time it takes for the ball to travel to the highest point Find the total time the ball is in flight Find the range Find the max height the
  23. physical science

    A car starts from rest and accelerates uniformly for 250 meters. It then moves with a constant velocity for 500 meters and slows down to rest in 300 meters. The whole trip takes 50 seconds. How long did the car move at constant velocity?
  24. Physics

    If you throw a ball into the air at some angle with respect to the horizontal, which of the following statements about the ball is true? The acceleration is zero at the top of the motion The horizontal component of the velocity is zero at the top of the
  25. Physics

    A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 80 kg and the hill is inclines at 15 degrees with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist
  26. physics

    a bus moving at 20m/s slows at a rate of 4m/s each second. how far does it travel while braking. i found the time which was 5 seconds. A car accelerates from rest at a rate of 5 m/s/s for a period of 4.2 seconds and then moves at a constant speed for 8
  27. Physics

    The drawing shows a skateboarder moving at v = 5 m/s along a horizontal section of a track that is slanted upward by 48° above the horizontal at its end, which is h = 0.52 m above the ground. When she leaves the track, she follows the characteristic path
  28. math

    An object that is tossed downward with an initial speed (velocity) of will travel a distance of s meters, where and t is measured in seconds. Solve for t.
  29. physical

    A biker rides on an upward-sloped road inclined at a 15.0° angle with the horizontal. If he moves at a constant speed of 2.0 meters/second for 60 seconds, what is the magnitude of his horizontal displacement?
  30. physics

    A biker rides on an upward-sloped road inclined at a 15.0° angle with the horizontal. If he moves at a constant speed of 2.0 meters/second for 60 seconds, what is the magnitude of his horizontal displacement?
  31. Physics

    A golf ball is hit into the air, but not straight up, and encounters no significant air resistance. Which statements accurately describe its motion while it is in the air? A.On the way up it is accelerating upward, and on the way down it is accelerating
  32. physics

    A rocket is fired vertically and reaches a speed of 34.3 m/s in half a second. One and a half seconds later the rocket’s speed is 19.6 m/s. Find the acceleration (in m/s2) and initial velocity (in m/s) of the rocket. Complete the equation of motion for
  33. Science - Physics

    When a projectile is fired horizontally, which of the components of its motion is (A) motion at constatnt speed (B) uniformly accelerated motion (C) If the initial velocity of the projectile is increased, what effect will this have on the time it takes the
  34. PHYSICS

    If a cart is released from rest at a 10 meter incline and takes 28 seconds to travel down this incline. 1. Calculate the average speed of the cart? 2. calculate the instantaneous velocity of the cart at the end of the 10 meters(this value should be twice
  35. PHYSICS

    If a cart is released from rest at a 10 meter incline and takes 28 seconds to travel down this incline. 1. Calculate the average speed of the cart? 2. calculate the instantaneous velocity of the cart at the end of the 10 meters(this value should be twice
  36. physics

    A 1500 kg car at rest rolls down a hill inclined at 10 degrees with the horizontal. A 400 N friction force opposes its motion on the inclined plane and a 600 N on the horizontal surface a) how fast will it be moving at point B b) how far from point C will
  37. physics

    a car of mass 1200 kg starts from rest, accelerates uniformly to a speed 4ms-1 in 2 seconds and continues moving at this constant speed in a horizontal straight line for additional 10s. the brakes are then applied and the car is brought to rest in 4s. a
  38. Physics

    An object moves in a circular path with constant speed. Is the object's velocity constant? Is its acceleration constant? Please explain. From what I've learned in my 8th grade science class, when velocity changes is when the direction or speed changes. So
  39. physics

    A skateboarder is approaching a set of stairs at a speed of 8 m/s. The stairs drop a vertical distance of h=3 meters and take up a horizontal distance d=5 meters. As the skater reaches the edge she can give herself a vertical component of velocity by
  40. trigo

    A submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21deg with the surface. a. If it goes for 300 meters along its download path, how deep will it be? What horizontal distance is it from its starting point? b. How
  41. Physics

    A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 25.2 m/s A 1.0-kg stone is thrown from the basket with an initial velocity of 11.7 m/s perpendicular to the path of the descending balloon, as measured relative to
  42. Physics

    The distance time graph shows a cart moving at a straight path. a. Describe the speed of the cart between: 1.) A and B - The cart is moving with constant speed for 10 seconds and it is now at rest for 20 seconds. 2.) B and C - The cart at rest for 20
  43. Physics

    Mutiple choice: A car travelling at 10 m/s accelerates at 3 m/s^2. Its new velocity is A.) 12 m/s B.) 22m/s C.) 17 m/s D.) Can not be determined. Which of the following is not acceleration? A.) rate of change of speed in a particular direction B.) rate of
  44. Physics

    A bicyclist is coasting down a road that is sloped downward at an angle of 8°. The bicycle and bicyclist have a total mass of 80 kg. If the bicycle wheels roll freely, without any effect from friction or air resistance slowing the motion, how fast would
  45. math

    The Great seto Bridge in Japan is 9,368 meters long. A bicyclist riding across the bridge can travel 500 meters in 1 minute. A person walking can travel 100 meters in 1 minute. How many minutes shorter is the bicycle trip than the walk?
  46. physics

    A 800·kg elevator is attached to a cable whose tension is 7800·N. Which of the following statements could describe the motion of the elevator? Choose all that apply. slowing down as it moves upward moving upward at constant speed speeding up as it moves
  47. Physical Science

    1.Instantaneous speed is measured B. when the object reaches its destination. C. at a particular instant. D. over the duration of the trip. 2. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls
  48. physics

    A car of mass 1200 kg starts from rest, accelerates uniformly to a speed of 4.0 m/s in 2.0 s and continues moving at this constant speed in a horizontal straight line for an additional 10 s. The brakes are then applied and the car is brought to rest in 4.0
  49. rates

    a bicyclist travels for 2h at an average speed of 12km/h. how far does the bicyclist travel ? at this speed how long will it take the bicyclist to at 54km?
  50. Physics

    A descent vehicle landing on Mars has a vertical velocity toward the surface of Mars of 6.0 m/s. At the same time, it has a horizontal velocity of 3.5 m/s. At what speed does the vehicle move along it's decent path? At what angle with the vertical is this
  51. Math - Calculus

    The horizontal velocity is constant. (Ignore air resistance.) Recall from your study of trigonometry that if you release a rock at a speed v in a direction that makes an angle α with the horizontal, then the initial vertical velocity vv and the horizontal
  52. phyics

    Consulting the graph shown in (Figure 1) , determine the object's average velocity over the time interval from 2 to 4 seconds. Express your answer in meters per second to the nearest integer. Position versus time graph for an object traveling with a
  53. Physics

    I have some questions regarding motion problems. If I have a ball at initial velocity of 50m/s at 35 degree angle, to find horizontal and vertical components, I do the following: Vertical is 50(sin35)=28.68-rounded to 29 Horizontal = 50 (cos
  54. Physics

    Sorry if it is alot of questions 1. A crate falls from an airplane flying horizontally at an altitude of 2000 m. Neglecting air resistance, about how long will the crate take to strike the ground? a. 10 seconds b. 20 seconds c. 400 seconds d. 100 seconds
  55. Dan

    Darryl Strawberry hits a baseball with a horizontal velocity of 45 m/s and a vertical velocity of 25 m/s... Find the time it takes for the ball to travel to the highest point Find the total time the ball is in flight Find the range Find the max height the
  56. Physics

    I have posted this one before, but the help I received went over my head... Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 21.0 m/s as it leaves the hose nozzle. Once it leaves the
  57. Physics

    In class, we completed a lab dealing with the range of a projectile. First, we dropped a metal ball down an inclined channel followed by a horizontal channel. We timed the ball on the horizontal channel and used this time and the channel length to find
  58. phyics

    Consulting the graph shown in (Figure 1) , determine the object's average velocity over the time interval from 2 to 4 seconds. Express your answer in meters per second to the nearest integer. Position versus time graph for an object traveling with a
  59. Physics

    I HONESTLY KNOW THAT THIS SITE IS NOT INTENDED TO JUST GIVE ANSWERS, BUT I HAVE NO IDEA HOW TO DO THIS PROBLEM WHATSOEVER, SO PLEASE MAKE NO COMMNENTS LIKE "post some work" OR ANYTHING LIKE THAT...IF I HAD WORK TO POST....I WOULDN'T REALLY NEED HELP... :)
  60. physical science 2

    It takes 6 seconds for a stone dropped from rest to the bottom of a well,what is its final speed A; 6 meters/second B: 30 meters/seconds C: 36 meters/seconds D: 60 METERS/SECONDS A is incrrect
  61. Physics- i need to know how to do these problems

    Two projectiles are launched from the ground, and both reach the same vertical height. However, projectile B travels twice the horizontal distance as projectile A before hitting the ground. a. How large is the vertical component of the initial velocity of
  62. Physics HELP

    1.If a particle moves in a plane so that its position is described by the functions x=A*cos(wT) and y=A*sin(wT), the particle is ( w-angular velocity, T-period) A) moving with constant speed along a circle B) moving with a varying speed along a circle
  63. Math

    Plane A and B ate both flying eastward with constant velocity in the same horizontal plane at angles 30 degrees and 60 degrees with respect to the horizontal respectively. The speed of A is 100 square root of 3 miles per second. Initially, the pilot of
  64. physics

    The position vector r of a particle moving in the xy plane is r=2ti+2sin[(pi/4)t]j , with is in meters and t in seconds. (a) Calculate the x and y components of the particle's position at , and 4.0 s and sketch the particle's path in the plane for the
  65. Physc

    A symmetric projectile spends a total of 20 seconds in the air. It reaches a peak height of 8 meters. HOw long it takes to reach its peak height? The projectile has a range of 80 meters.What is its horizontal velocity? What is the projectile's horizontal
  66. algebra

    A jogger leaves home and runs at a constant speed of 4 miles per hour. Nine minutes later, a bicyclist follows along the same route at a constant speed of 15 miles per hour. Find the bicyclist's travel time needed to catch the jogger.
  67. Physics

    A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
  68. Physics

    A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
  69. PHYSICS

    A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity.
  70. physics

    A plane is flying horizontally at a height of 500 m and a constant speed of 429 km/h when an object is projected vertically downward at an initial speed of 35.0 m/s. If air resistance is neglected, the average vertical component of velocity between the
  71. physics

    A small ball is set in horizontal motion by rolling it with a speed of 3.00 m/s across a room 12.0m long, between two walls. Assume that the collisions made with each wall are perfectly elastic and that the motion is perpendicular to the two walls. (a)Show
  72. Algebra

    Radio signals travel at a rate of 3*10^8 meters per second. How many seconds would it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 4.2*10^7 meters? (Hint: Time is distance divided by
  73. Re: PHYSICS

    "Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring
  74. Physics

    A 20.0-kg crate sits at rest at the bottom of a 20.0 m -long ramp that is inclined at 40 ∘ above the horizontal. A constant horizontal force of 290 N is applied to the crate to push it up the ramp. While the crate is moving, the ramp exerts a constant
  75. Physics help!!

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35.4 m/s. At the same time, it has a horizontal velocity of 57.2 m/s. At what speed does the vehicle move along its descent path? At what angle with the
  76. Physics

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35.4 m/s. At the same time, it has a horizontal velocity of 57.2 m/s. At what speed does the vehicle move along its descent path? At what angle with the
  77. Physics

    A bicyclist starts from rest and accelerates at 4 m/s^2 for 3 seconds. The cyclist then travels for 20s at a constant speed. How far does the cyclist travel? I got 138 m but I'm not sure if I'm right?
  78. Physics

    A 55 kg ice skater, initially at rest on a flat skating rink, requires a 198 N horizontal force to be set in motion. However, after the skater is in motion, a horizontal force of 175 N keeps her moving at a constant velocity. Find the coefficients of
  79. Physics Problems

    I have a few questions that I don't understand and are having troulbe with, could you please help me out? Thanxs! What is the acceleration of a car that maintains a constant velocity of 100 km/hr for 10 seconds? (For this one don't I have to get the same
  80. PHYSICS

    Please help and let me know if I did something wrong. If a cart is released from rest at a 10 meter incline and takes 28 seconds to travel down this incline. 1. Calculate the average speed of the cart? I wrote s=ad/at=10m/28 sec = 357 m/s 2. calculate the
  81. Physics

    A car moves in a circular path at 15 mph. Which of the following statements about the cars motion would be correct? a. The cars acceleration is constant. b. The cars velocity is constant. c. The cars speed is constant. d. The cars velocity and speed are
  82. Science

    Starting from rest an airplane moves with a constant acceleration of 2m/s for 30 seconds before it takes off A. How far does it travel down the runway before it takes off ? B. What's it's final velocity ?
  83. active physics

    a=change in velocity/time, is this the formula i use for this question: a car takes 5 seconds to speed up from 10 m/s to 60 m/s. what is the acceleration? yes! so what do i do from there? If it goes from 10 to 60, what is it's CHANGE in velocity (speed)?
  84. Algbrah

    A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched
  85. math 116

    A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched
  86. math 117

    A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched
  87. math 117

    A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched
  88. math 117

    A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched
  89. Physics

    A car accelerates from rest with a uniform acceleration of 1.7m/s for 10 seconds, its acceleration then reduces by 0.3m/s for 20 seconds of the motion, it then maintains the speed attained for another 20 seconds after which it decelerates to rest within 10
  90. Physics

    A hot air balloon containing an AP Physics student ascends vertically at a constant speed of 8 m/s. While ascending, he accidentally drops his rubber duckie from the gondola of the ballong. Seven seconds after it is dropped the duckie bounces off a roof at
  91. AP Physics

    A hot air balloon containing an AP Physics student ascends vertically at a constant speed of 8 m/s. While ascending, he accidentally drops his rubber duckie from the gondola of the ballong. Seven seconds after it is dropped the duckie bounces off a roof at
  92. Physics

    If a car is moving on a highway at 70 kilometers per hour, going south, and then turns to travel 70 kilometers per hour east, what happens to its speed and velocity? Speed is constant, velocity is constant. Speed is changing, velocity is constant. Speed is
  93. physics

    A 20 kg sled rests on a horizontal surface. if it takes 75 N to start the sled in motion and 60 N to keep it moving at a constant speed, what are the coefficients of static and kinetic friction respectively? explain please
  94. Physics

    The first meters of a 100-meter dash are covered in 2 seconds by a sprinter who starts from rest and accelerates with a constant acceleration. The remaining 90 meters are run with the same velocity the sprinter had after 2 seconds. a. Determine the
  95. Calculus

    A particle moves on a vertical line so that its coordinate at time t is 3 y = t − 12t+ 3, t≥ 0 . When is the particle moving upward and when is it moving downward? Find the distance that the particle travels in the first 3 seconds. I got that
  96. physics help

    A woman is pushing a sofa at constant speed of 1.0 m/s on a horizontal surface. She exerts a horizontal force of 80 N in the direction of motion. A) how can the sofa move at constant speed without Newton's first law being violated? B)Approximately how hard
  97. physics 111 "2"

    1 A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take 20 m/s 10 m/s 30 m/s 15 m/s 2 What is common to the variation in the range and the height of a projectile? time of flight vertical
  98. physics

    A rock dropped from a small bridge encounters no air resistance and hits the pond below 1.0 s later. If it had been thrown horizontally with a speed of 10 m/s, then it would have hit the water A. more than 1.0 {s} later, since it has a greater distance to
  99. phy

    1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the
  100. physics

    A rule of thumb for driving is that a separation of one car length for each 10 mi/h of speed should be maintained between moving vehicles. Assuming a constant reaction time, discuss the relevance of this rule for (a) motion with constant velocity and (b)