6. Now make body A stationary and take the speed of B in reference to A, so relative Speed of B = sum of their respective speeds = 20 + 30 = 50 kmph ( as they are travelling in opposite directions). = (2 × 10/60) km Since the directions are opposite we consider speed of object `- S_o`. So, their relative speed is equal to (x – y) km/hr [x > y], The time after which both bodies meet = distance traveled / relative speed. Suppose two trains or two objects bodies are moving in the same direction at u m/s and v m/s, where u > v, then their relative speed is = (u – v) m/s. Problem on Train running same direction. S man – Speed of man. When do we consider the body to be in motion? Two bodies moving towards each other are A and B with speeds 20 kmph and 30 kmph. If both the person moves towards each other, then they are moving faster than normal. for a person sitting in a train moving with a Speed of 40 km/hr in the west direction, another train which is going towards east with a Speed of 40 km/hr, will appear to move at a Speed of (40+40) = 80 km/hr. option (b) substitute x= 52 and x=55 in the second equation and see for which value you are getting an integral value for y. Thus denominator of equation becomes `S_t + S_o` Then we can say that the Relative Speed is as: (a + b) or the sum of the two velocities. Question 6 : A 500 m long train takes 36 seconds to cross a man walking in the opposite direction at the speed of 10 km / hr. Make train B stationary and then take the Speed of train A relative to the train B. If an object is moving slower, then it is considered to be at a lower speed, whereas if an object is moving faster, then it is considered to be at a higher speed. Here we shall see some examples of this concept and then learn some tricks from other examples. 4. To catch Bhagu Ram he needs to travel a distance of 200 ms or 0.2 km. x - 5 = 45 x = 50 km/hr. What is the Relative Speed of an Object Moving in the Same Direction? Question:Two vehicles are travelling from the same location at the speed of 6 km/hr and 4 km/hr respectively. What is t… The term Gear Ratio is used to calculate speed and torque of output gear when torque is applied to the input gear. The theory of Relative Speed is vital to most of the physicists. before the crash total Distance covered by the bird = 0.2 * 10/100 km = 20 meters. In how many seconds will Train A completely cross the passenger in Train B? If you are lying still on the ground, so are you in motion, or are you at rest? The velocity ratio and train value of gear train: Velocity ratio or speed ratio. If one moves towards you, we can calculate his/her speed by evaluating the difference between their relative spots taking a fixed point as a frame of reference with respect to you. An another running train (Opp direction), Time = L train +L obj / (S train + S obj) Where, L train – Length of train. 'Speed' is something that must be measured by someone or something. A train is moving at a speed of 132 km/hr. Then we can determine the relative speed as (a+b) or the sum of two velocities. Relative Speed -Train A and man moving in the opposite direction with a Speed of 2.5 m/s=10 +2.5 = 12.5m/s. When two bodies are moving in the same direction, the relative speed is computed by their difference. Required fields are marked *, Speed of body = Speed of river (as Speed of boy is 0) = 5 kmph, Let us use a different approach for this question. The velocity of the cyclist relative to the train = 3 – (-v) (Similarly, reduction of 20% => 0.8 y. There is no such thing as fixed points; hence we need to look at the frames. A man rows 135 km upstream in 2.7 hours. If one person initiates movement towards the other, the only way to know their speed is by measuring the position relative to the fixed position, which is most likely to be the other person. Let the speed of 1st body be x km/hr What is the Distance Bhagu Ram who is running at 5 kmph would have covered before being caught by Pakad Singh running at 7 kmph? V BC (Velocity of train with respect to ground) = 70m/s. r is rate, or speed (sometimes denoted as v, for velocity), t is the time taken to complete the motion. Using the distance formula (Distance = rate x time, or D = rt) we can express the distance traveled by each train: Train A moving at 70 mph in t hours will cover 70t miles Train B moving at 60 mph in t hours will cover 60t miles Together the two trains will cover the distance 70t + 60t

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