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May 18, 2015



Jun 28, 2015



May 21, 2014

#### a farmer moves along the boundary of a square field of side 10m in 40s.what will be the magnitude of displacement of the farmer at the end of 2minutes 20s from his initial position?



Total distance 40m in 40 sec.
Total time taken by the farmer = 2 min 20 sec. =140 seconds.
Total rounds completed= 140/40=3.5 rounds
That means if the farmer starts f...

Jan 12, 2014

#### Please ans its urgent



i did not understand

Jun 4, 2014



1.666km/h

May 19, 2015

#### Define retardation.



The velocity of body decrease with time the motion is said to be retardation *the opposite of accelaration

Sep 8, 2014

#### State the differences between distance and displacement.



1. Distance is the length of the path travelled by a body in certain interval of time, whereas displacement is the shortest distance between the initial and final positions of a body.
2. Distance is a sc...

Jun 28, 2014

#### On a 120 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must the train travel the next 90 km so as to average 60 km/h for the entire trip ?



Speed of the train in the first 30 km, v1 = 30 km/h
Speed of the train in the next 90 km, v2 (to be determined)
Average speed = 60 km/h = (v1 + v2)/2...

Sep 29, 2013

#### plese give me all formula of motionforce and law of motion &gravitation



1. S= ut +(1/2) at2
2. v = u + at
3. v2-u2 = 2as
4. F = M(v-u)/t
5. F = ma
6. W = F.S cos θ
7. p = w/t

Mar 28, 2014