Question

A body of mass 1 kg accelerates uniformly from rest to a velocity of 1 m/s in 15sec. The kinetic energy of the body will be 2/9 J when the is equal to ??
Please answer to this question....

Answer 1

Mass =1kg

U=0s

V=1m/s

T=15m/s

KE=2/9j

A =(v-u) /t

=(1-0)/15

A=1/15

V=U+AT

V=AT

V=1/15*T

V=T/15

KE =1/2 MV^2

KE =1/2*1*T^2/225

2/9=T^2/255

2/9*225=T^2

T^=2*25

T^2=100

T=10

Answer 2

Answer:

Your answer is 10 s

Explanation:

Mass =1kg  , U=0s , V=1m/s , T=15m/s  , KE=2/9j

A = (v-u) /t

    = (1-0)/15

A=1/15

V=U+AT

V=AT

V=1/15*T

V=T/15

KE =1/2 MV^2

KE =1/2*1*T^2/225

2/9=T^2/255

2/9*225=T^2

T^=2*25

T^2=100

T=10

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