Answers

2015-10-20T13:04:01+05:30
given,
mass of the object=1000kg
initial velocity of the object=0m/s
distance traveled=20m
time taken=2sec
therefore work done ,
work= force* displacement.
work= force*20
force,
force= mass*acceleration
force= 1000*acceleration
acceleration,
s=ut+1/2at^2
20=0*2+1/2*a*(2)^2
20=0+1/2*a*4
20=2a
20/2=a
10=a
acceleration=10m/s^2
therefore,
force=mass*acceleration
F=1000*10
F=10000 N
therefore,
work done = force*displacement
W=10000*20
W=200000 J
W=2*10^5 J.
               i hope that this will help u.....................
 

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