A trolley is moving horizontally with a constant velocity


Asked by admin @ in Physics viewed by 306 People


A trolley is moving horizontally with a constant velocity of v with respect to earth. A man starts

running from one end of the trolley with a velocity 1.5 v with respect to trolley. After reaching the opposite end, the man returns back and continues running with a velocity of 1.5 v w.r.t. the trolley in the backward direction. If the length of the trolley is L then the displacement of the man with respectto earth during the process will be :-​

Answered by admin @



Answer:

initial velocity of trolly = v


let when start running then velocity of trolly become =v1

 velocity of man with respect to earth = ( v1 + 3/2v)

conservation of momentum


(m+m)v = mv1  + m(v1 + 3/2v)


v1 =v/4


time taken by man to reach at the other end t1 = L /(3/2 v)
=2L/3v


when starts moving in backward direction let velocity of trolly  =v2


then velocity of man w.r.t earth  = v2 - 3/2 v


conservation of momentum


(m+m)v = mv2  + m(v2 - 3/2 v)


v2 = 5v/4


time taken by man to reach at the initial  end t2 = L /(3/2 v)
=2L/3v


so distance moved by trolly  = V1 t1  + V2 =v/4 * 2L/3v   +  5v/4 * 2L=L


Similar Questions

An electron moving horizontally with a velocity of 4

Asked by admin @ in Physics viewed by 290 persons

an electron moving horizontally with a velocity 4 * 10^4 m/s enters a region of uniform magnetic field of 10^-5 T acting vertically down ward, find the time it takes …

A beam of electrons is moving with constant velocity

Asked by admin @ in Physics viewed by 293 persons

36. A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength 20 Vm-1 and 0.5 T at right angles to the …

If a car is moving to the left with constant velocity, one can conclude that

Asked by maham237 @ in Physics viewed by 358 persons

If a car is moving to the left with constant velocity, one can conclude that there must be no forces applied to the car. the net force applied to the …

A charge particle moving with constant velocity produces

Asked by admin @ in Physics viewed by 265 persons

Does charge moving with constant velocity produce electric field

A charged particle moving with constant velocity produces

Asked by admin @ in Physics viewed by 278 persons

Does charge moving with constant velocity produce electric field

A mass m moving horizontally with velocity v collides

Asked by admin @ in Physics viewed by 300 persons

A mass m moving horizontally along x axis with velocity v collides and sticks to a mass of 3m moving vertically upwards with its velocity 2v. The final velocity of …

A 60 g bullet is fired horizontally with a velocity

Asked by admin @ in Physics viewed by 358 persons

A 2-oz bullet is fired horizontally with a velocity v1 = 1800 ft/sec into the 6-kg block of soft wood initially at rest on the horizontal surface. The bullet emerges …

A ball moving with velocity of 9m s

Asked by admin @ in Physics viewed by 350 persons

A ball moving with velocity of 9m/s collides with another similar stationary ball. After the collision both the balls move in directions making an angle of 30 degree with the …

A particle moves on a rough horizontal ground

Asked by admin @ in Physics viewed by 294 persons

A particle moves on a rough horizontal ground with some initial velocity say V°. If of its kinetic energyis lost due to friction in time t°, then coefficient of …

An aeroplane flying horizontally with a velocity of 216

Asked by admin @ in Physics viewed by 274 persons

An aeroplane is flying horizontally with a velocity of 216 km / hr at a height of 1960 m. when it is vertically above a point ‘a' on the ground, …

At a given instant a is moving with velocity

Asked by admin @ in Physics viewed by 296 persons

4. At a given Instant, A is moving with velocity of S m/s upwards. What is velocity of B at the timeB(A) 15 m/st (8) 15 m/st (C) …

A body moving horizontally with acceleration in vertical direction

Asked by admin @ in Physics viewed by 337 persons

State which of the following situations are possible and give an example of each of these- 1 a body moving with constant acceleration but with zero velocity 2 a body …

A boat is moving with a velocity 3i 4j

Asked by admin @ in Biology viewed by 371 persons

A boat is moving with a velocity 3i + 4j with respect to the ground .The river water is moving with a velocity -3i - 4J with respect to the …

Consider a car moving on a straight horizontal road

Asked by admin @ in Physics viewed by 289 persons

consider a car moving along a straight horizontal road with a speed of 72km/h If the coefficient of static friction between tyres and road is0.5 the shortest distance in which …

A bus is moving with a velocity 10m s

Asked by admin @ in Physics viewed by 315 persons

A bus is moving with a constant velocity 10m/s on a straight road. a scooterist wishes to overtake the bus in 100s . if the bus is at distance of …

Most viewed questions in Physics


Jeevandeep health and physical education std 10 answers pdf

Asked by admin @ in Physics viewed by 11020 persons


Hc verma physics class 9 solutions of describing motion

Asked by admin @ in Physics viewed by 2640 persons


How to leave nightmare land answer key

Asked by maham237 @ in Physics viewed by 1562 persons



Base area and stability of some objects with different shapes

Asked by admin @ in Physics viewed by 1498 persons


Which of the following statements about safe lifting are correct

Asked by admin @ in Physics viewed by 1490 persons


Porous water-absorbing mass of fibers

Asked by wiki @ in Physics viewed by 1458 persons



Absorption of water by filter paper is due to

Asked by admin @ in Physics viewed by 1409 persons


A composite wire of uniform diameter 3mm

Asked by admin @ in Physics viewed by 1372 persons


A rocket of mass m is launched straight up with thrust f⃗ thrust.

Asked by maham237 @ in Physics viewed by 1288 persons



At a distance l 400m from the traffic light

Asked by admin @ in Physics viewed by 1288 persons


Mind map for light reflection and refraction class 10

Asked by admin @ in Physics viewed by 1122 persons



A thief runs at a speed of 10m s

Asked by admin @ in Physics viewed by 1069 persons


A 5.8 x 10 4 watt elevator motor can lift

Asked by maham237 @ in Physics viewed by 1055 persons