Question

À is running at a speed of 15 km /hr B at a speed of speed of 270 m/min and C at a speed of 400 m /sec, who has the highest and Lowest speed ?​

Answer 1

Answer:

It is like one car is moving with v speed and other with 2v speed because one is 15 km/h and other is 30 km/h .

K.E=0.5×m×v

2

K.E(1st)=0.5×m×v

2

K.E(2nd)=0.5×m×(2v)

2

Hence the ratio is 0.5×m×v

2

:0.5×m×(2v)

2

=1:4

Hence the ratio is 1:4.

hope it helps uh...

Step-by-step explanation:

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Answer 2

Answer:

It is like one car is moving with v speed and other with 2v speed because one is 15 km/h and other is 30 km/h .

K.E=0.5×m×v

2

K.E(1st)=0.5×m×v

2

K.E(2nd)=0.5×m×(2v)

2

Hence the ratio is 0.5×m×v

2

:0.5×m×(2v)

2

=1:4

Hence the ratio is 1:4.