A car moves a distance of 200 km. It covers the first half of the distance at speed 40 km/h and second half of the distance by speed v. The average speed is 48 km/h. Find the value of v

50,196 results

  1. physics

    A car begins at rest at t0 = 0. The car starts moving and finally covers a distance d = 617 m in a time tf = 105 s. In a coordinate system with north being the positive x-direction, the car's motion is in the southern direction. What was the car's average

  2. maths

    A car travelled 100 km with half the distance at 40km/h and the other half as 80 km/h.Find the average speed of the car for the whole journey.

  3. Maths

    The braking distance of a car is directly proportional to te square of it's speed. When the speed is p metres per second, the braking distance is 6m. When the speed is increased by 300%, find (a) an expression for speed of the car (b) the braking distance

  5. Math

    The total distance a freely falling body covers in time, t, is given by the equation d(t)=1/2 gt2 where g is constant at 10 m/s2 Show, in terms of n, the distance a falling body covers in t = n seconds of movement. Show, in terms of n, the distance a

  6. physics

    Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they are moving in the +x

  7. Science

    A car starts from rest and moves with constant acceleration during the 5th second of its motion,it covers a distance of 36 meters. what is the acceleration

  8. physics

    The driver of a car, traveling at a constant 25 m/s, sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5 m/s^2. What's the total distance the car moves before it stops?

  10. Physics

    A race car can be slowed with a constant acceleration of -11 m/s^2 a. If the car is going 55 m/s, how many meters will it travel before it stops? b. How many meters will it take to stop a car going twice as fast? According to one of the teachers this is

  11. ALGEBRA

    A car travels 20 kph faster than a truck. The car covers 350 km in two hours less than the time it takes the truck to travel the same distance. What is the speed of the car? How about the truck?

  12. Math

    Ethan drove his car to his grandparents’ house at a steady rate of 54 miles per hour. The table shows the distance Ethan had driven based on the time that had passed. 1/2(hours)=27(distance) 1(hours)=54(distance) 1 1/2(hours)=81(distance)

  13. mathematics

    a traveler moves from a town p on a bearing of 055degree to another town q 200 km away, he then moves from q on a bearing of 155degree to another town r 400km from q.find the distance between p and r,bearing of p from r correct to 3significant figures

  15. Science

    If a car covers 2/5th of the total distance with V1 speed and 3/5th distance with V2, then average speed is?

  16. Algebra

    Traveling with a speed of 70 mph, a car covered a distance D miles in T hours. Write an equation that relates the distance D this car travels in T hours. Use the equation to find the distance the car travels between 3:30 p.m. and 5:00 p.m.

  17. F/maths

    X, Y and Z are three points on a straight road.A car passes X with a speed of 5m/s and travels from X to Y with a constant acceleration of 2m/s^2. The car then moves with a constant retardation of 3.5m/s^2 from Y to Z and comes to rest at Z. If the total

  18. physics

    car moving on a straight road covers a distance of 1.5 km due east in 150 second.what is the speed of the car?what is it's velocity?

  20. physics college

    An antelope moving with constant acceleration covers the distance between two points 70.0 m apart in 7.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first point? (b) What is its acceleration? A car is stopped at a

  21. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

  22. Math/Physics

    A car of mass 0.9 tonnes is driven 200 m up a slope inclined at 5° to the horizontal. There is a resistance force of 100 N. (i) Find the work done by the car against gravity. (ii) Find the work done against the resistance force. (iii) If the car slows

  23. PHYSICS

    An odometer in a car has a reading of 50 km at the beginning of a trip and a reading of 125 km half an hour later. What is the average speed of the car? A. 3.75 km/h B. 62.5 km/h C. 1250 km/h D. 250 km/h The only way to find the average speed is to divide

  25. As physics

    Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

  26. Mathematics C 8th grade

    Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the distance in 4 h. Car A traveled 22 mph faster than Car B. How fast did Car A travel? _______MPH

  27. physics

    A car moves a distance of 200 km. It covers the first half of the distance at speed 40 km/h and second half of the distance by speed v. The average speed is 48 km/h. Find the value of v

  28. physics

    A car accelerates from rest at 1.0 m/s^2 for 20s along a straight roa, it then moves at a constant speed for half an hour, it then deccelerates uniformly to a stop in 30s. Find the total distance covered by the car.

  30. Calculus

    a police helicopter is flying at 200 km/hr at a constant altitude of 1 km above a straight road. The pilot uses radar to determine that an oncoming car is at a distance of exactly 2 km from the helicopter, and that this distance is decreasing at 250 km/hr.

  31. physics

    A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far

  32. Maths Algebra

    A steamer goes downstream and covers the distance between two ports in 4 hours while it covers the same distance upstream in 5 hours.If the speed of the stream is 2 km/h.Find the speed of steamer in still water.Check your solution.

  33. Calculus

    The velocity of a car (in miles per hour) is given by v(t) = 61.25t − 17.5 t^2 where t is in hours. Write a definite integral for the distance the car travels during the first 2.5 hours. Use your graphing calculator to find this distance. Distance =

  35. Physics

    A driver in a car, originally moving at 13.1 m/s, applies the brakes until the car comes to a stop. The car moves a distance of 34.1 m while braking. How much time did it take for the car to stop? Assume constant acceleration during braking.

  36. physics

    "a drag racing car starts from rest at t= 0 and moves along astraight line with velocity given by V = bt^2 where b isconstant. The expression for the distance traveled by this car from its position at t = 0 is a)bt^3 b)bt^3/3

  37. Physics

    I really cannot understand how to get to the answer. Thank you! Two cars are traveling, Car A is behind the other, on a straight road. Each has a speed of 21 m/s and the distance between them is 25 m. The driver of the rear car decides to overtake the Car

  38. math

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

  40. Calculus

    Two points P and Q are connected by a straight road of length d. At time t = 0, a car starts driving from P to Q at a constant speed c. At t = 0, a bee starts flying from Q toward the car at a constant speed b > c, and takes a zig-zagging path, reversing

  41. chemistry

    a car covers a distance of 200 mile in 3 hours. How many kilometers will it travel in 25.0 minutes? first, convert the 200 miles to km. I get about 320 km. Then, convert the hours to min....I get about 180 min. so you know speed in km/min....divide the

  42. physics

    a car moves from A to B covering a distance of 1000km it covers the first 300km at 60km/h the next 400km at 80 km /h at what speed it should it cover the remaining distance so that achieve an average speed of 70km/h?

  43. physics

    a car moves from car A to B covering a distance of 600km/h if it covers first 400km at 80km/h and the other remaining at 100km/h .What is the average speed for entire journey

  45. physics

    A car moves for half of its time at 80km/hr and for rest half of timeat 40km/hr. Total distance covered is 60km.What is the average speed of car

  46. physics

    A particle moves half distance by 20 m/s and stay half distance moves by 30 m/s. Average speed of total journey should be?

  47. Math

    The diameter of a wheel car is 42 cm.how much distance will it covers in 200 revolutions

  48. physics

    A car covers half a distance at a velocity of 80km/h and the other half at 60km/h,what is the average velocity of the car?

  50. Physics, chemistry, mathematics, English.

    A car starting from rest moves with an acceleration of 15m/s² the distance it covers in the 4th seconds of its motion is ?

  51. Physics

    A car moves for half of its time at 80km/hr and for rest half of time at 40km/hr.The total distance covered is 60km.What is the average speed of the car?

  52. maths

    With a uniform speed a car covers a certain distance in 8 hrs. If the speed of the car is increased by 4 km per hour , the same distance can be covered in 7 1/2hrs.Find the distance covered ?

  53. Physics

    Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 515 m in 229 s. Assume that they are moving in the +x

  55. science

    A car moving with constant acceleration covers the distance between two points 60 m apart in 6 seconds.Its speed point is 15 m/s.At what prior distance from the first point was the car at rest?

  56. Physics mechanics

    Car travelling speed 30 km/h stops after 8m distance through brakes.If same car moves at 60km/h. what is the stopping distance

  57. physics

    the maximum possible speed a certain car can achieve is 80 m/s (about 180 mph) the car covers a distance of 1km while accelerating up to this speed from rest how fast is the car moving at the halfway point of 500m (the answer is not 40m/s) at what point is

  58. Physics

    A car moves with 60km/h in first one hour and with 80km/h in next half an hour. Find 1. Total distance travelled by the car. 2. average speed of car in total 1.5 hours.

  60. physics

    a particle covers 1/2 distance between A and B with a velocity V0. during 1/2 of the time required to cover the remaining distance the particle moves with a velocity V1 and rest moves with a velocity V2. find the average velocity of the particle

  61. calculus

    Car A is 30 mi apart from car b. Car A moves 30 mph due east at the same time car b moves 30 degrees south of east. how fast is the distance between them changing after an hour.

  62. science

    a car travels a distance of 8 km from p to q then moves 6 km at right angle to PQ find its resultants 1.distance 2.displacement

  63. math

    distance = rate x time or d = r*t car traveling 40 mi/hr goes 40 mi/hr x 1.5 hrs head start or 60 miles head start. Let t = time bus and car travel. car travels distance of r*t = 40*t. Car already had 60 mi head start. Total distance car traveled is 60 +

  65. physics

    a fly moves from one corner of the floor of a room and you are standing opposite corner into the room .Describe the displacement of the fly when it covers half of the distance.

  66. physics

    a fly moves from one corner of the floor of a room and you are standing opposite corner into the room .Describe the displacement of the fly when it covers half of the distance.

  67. Physics

    acar traveling along a straight roed increases it's speed from 30m/s to 50m/s a distance of 300m .If the acceleration is constant how much time elapses while the car moves this distance?

  68. physics

    a car of mass 'm'starts from rest and is driven with constant power.after some time it covers a distance 'x'.what should be the speed of car?how we can find the speed of car?

  70. Science

    A car is travelling in the velocity of 20m/s.After 30 sec it covers a distance of 1200m.calculate the accelaration of the car and final velocity of the car.

  71. physics

    A car begins at rest at t0 = 0. The car starts moving and finally covers a distance d = 617 m in a time tf = 105 s. In a coordinate system with north being the positive x-direction, the car's motion is in the southern direction (see figure. What was the

  72. math, physics

    A motorboat goes upstream on a river and covers the distance between two towns on the riverbank in 6 hours. It covers this distance downstream in 5 hours. If the speed of the stream is 1.5 km/h, find the speed of the boat in still water. [This problem is

  73. physics

    A car covers a distance of x,while moving at 54km/1 in 15sec.Find the value of x

  75. physics

    A car travel a distance of 8 km frome P to Q then moves 6 km at right angles to PQ .Find its travel distance and displacement Solution

  76. physics

    an athlete runs at a distance of 1500m in the following manner:1.starting from the rest he acceralate himself uniformly 2m/s*s till he covers a distance of 900m 2.he then runs the remaining distance of 600m at the uniform speed developed Calculate the time

  77. physics

    A car travel a distance of 8 km frome P to Q then moves 6 km at right angles to PQ .Find its travel distance and displacement

  78. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

  80. physics 2 for college

    a jet propelled motorcycle start from rest moves in a straightline with constant acceleration and covers a distance of 64m in 4seconds.?

  81. maths

    Raj 's office is 2x km away from his home.He covers half of the distance by bus at a speed of 80km/hr and the rest by auto rickshaw at speed of 70km/hr.If the time taken to reach the office is 3hrs,find the distance between raj 's office and his house

  82. physics

    A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2 . Through the rest of that distance, its acceleration is – 0.750

  83. Physics

    A car moving with a constant acceleration covers the distance between two points 80 m apart in 8.0 s. Its velocity as it passes the second point is 14 m/s.How far behind the first point was the car at rest?

  85. hihhh

    A car starts from rest and covers a distance of 22.0 m while accelerating at a constant rate of 2.6 m/s2. If the radius of the car wheels is 26.0 cm, what is the final angular speed (in rad/s) of the car wheels? Hint: If you're unsure where to start, think

  86. physics

    if a car covers 2/5th of the total distance with v1 speed and 3/5th distance with v2 then average speed is?

  87. Physics

    A car weighing 9800 N moves around a circular track of 70 m in 60 s. a. What is the speed or the car? b. What is the centripetal acceleration? c. What is the centripetal force? d. What is the coefficient of friction between the tires and the road? The

  88. physics

    A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far

  90. physics

    Two cars both cover a straight distance, d = 268 m, in time t = 29 s. Car A moves at a constant velocity (vA). Car B moves at a constant acceleration (aB), starting from an initial velocity of v0B = 12 m/s. Assume both cars are moving in the positive

  91. Science

    A car completes a half of a circular track that has a radius of 10 m. What is the distance traveled by the car? What is the displacement of the car?

  92. physics

    A cyclist travels a distance of 4km from a to b and then moves a distance of 3km towards north find distance and displacement

  93. physics

    a car for half of its time at 80km/h and for rest half of time at 40 km/h. total distance covered is 60 km/h. what is the average speed of car find

  95. Physics

    A 850.0-kg car travelling on a level road at 27.0 m/s (60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m (200.1 ft). (a) Find the size of the horizontal force which the car applies on the road while stopping. (b) Find the stopping distance

  96. physics

    a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.

  97. maths

    a car moves 300m due north and then 60mdue south .what is the distance covered by the car and what is its dislacement

  98. Physics

    A car starts from rest and moves with uniform acceleration of 0.3 meter per second. After 30 second, find the velocity of the car and distance covered?

  100. Calculus Physics

    A 1559-kg car moves at 15.0 m/s. What is the magnitude of the horizontal net force needed to bring the car to a halt in a distance of 50.0 m?

  101. physic

    A particle moving with uniform retardation covers distance 18 M, 14 M and 10 m in successive seconds it comes to rest after travelling a further distance of

  102. physics

    one car moving on a straight road covers 1/3 of the distance with 20kmph and the rest with 60kmph find th average speed

  103. Physics

    A body dropped from the top of the tower covers a distance 7x in the last second of its journey, where x is the distance covered in first second. How much time does it take to reach the ground?

  105. physics

    In many countries, automatic number plate recognition is used to catch speeders. The system takes a time-stamped license plate photo at one location (like an on-ramp to a freeway), and then takes a second time-stamped photo at a second location a known

  106. physics

    PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it moves. Find the magnitude of the charge on

  107. Math

    A car moves along a straight road in such a way that its velocity (in feet per second) at any time t (in seconds) is given by v(t) = 3t sqrt(64−t^2) (0 ≤ t ≤ 8). Find the distance traveled by the car in the 8 sec from t = 0 to t = 8.

  108. mathematics

    If a person walks at 4 mph, he covers a certain distance. If he walks at 9 mph, he covers 7.5 miles more. How much distance did he actually cover?

  110. physics

    Two particle p and q starting from rest moves along a straight part covers the same distance in time tpandtq respectively.if the acceleration on of p is 4times that of q,determine the ratio of tpandtq

  111. physics

    A car initially traveling at 31.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires

  112. Physics

    Calculate the vertical distance an object dropped from rest covers in 12 seconds of free fall. (The unit of measure for distance is the meter, written as m.)

  113. math

    Frances walks half the distance at 5km/h and ru the other half at 10km/hit the total time for her journey is 3 hours,what is the distance

  115. Physics (Kinematics)

    A car starts from rest and accelerates uniformly for 10 seconds over a distance of 200 m. Determine the acceleration of the car.

  116. algebra

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

  117. math

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

  118. Algebra

    The distance required for an emergency stop for a car varies directly as the square of the car’s speed. A car traveling at 50 mph requires 140 feet to stop. What is the stopping distance for a car traveling at 30 mph? What is the stopping distance for a

  120. physics - stopping distance

    when a driver brings a car to a stop by breaki.g as hard as possible the stopping can be regarded as the sum of reaction distance and breaking distance. tje following data are given, v1 m/s contains 10,20,30. reaction distance are 7.5, 15, 22.5. the

  121. Physics

    The position of a particle moves along the equation X = Vo/K (1 - e^(-KT)) Vo and K are constants a)determine the total distance that the particle moves b) Show that the aceleration is derived from the velocity c) Reason how it could take an infinite

  122. Physics

    A car initially traveling at 33.4 m/s undergoes a constant negative acceleration of magnitude 1.80 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires

  123. Physics

    A car initially traveling at 33.4 m/s undergoes a constant negative acceleration of magnitude 1.80 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires

  125. algebra

    In a movie stunt, a car is driven off a cliff and falls into the ocean 200 feet below. If the car is going 50 feet/second (horizontally) when it goes over the cliff, its horizontal position is described as x = 50 t, where t is the time in seconds. Its

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