Question

An athlete of mass 60kg in the Olympic games covers a distance of 100m in 10s, find his average kinetic energy

Answer 1

Answer:

The speed of the athlete=v=

Time

Distance

=

10s

100m

=10m/s

Thus the kinetic energy of the athlete=

2

1

mv

2

The mass of a man may vary between 40kg and 100kg.

Hence the kinetic energy may range between,

2

1

×40×10

2

J=2000J and

2

1

×100×10

2

J=5000J.

Range,

2000J−5000J