Answers

2015-04-18T08:21:03+05:30
1.When an object is in uniform motion it's path will be in a straight line.
2. u=80 km  =80,000 m
    t  1    hr       3,600 s 
 v=60 km  = 60,000 m
 t  1  hr        3,600 s
 a=  vu
       t   t
   = 60,00080,000
      3,600     3,600
   = 50200
      3      9
   =150-200
        9
   = -50
       9
   = -5.55 m/s 
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2015-04-18T09:31:53+05:30
1) when an object travel in uniform motion then its  trajectory is a straight line path.
2) initial speed (u)=80km/hr
final speed (v)=60 km/hr
acceleration is given by=v-u
                                        t
= 60-80
    2
-20  = -10
 2  
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