Work, Power and EnergyHard
Question
An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range
Options
A.200 J - 500 J
B.2 × 105 J - 3 × 105 J
C.20,000 J - 50,000 J
D.2,000 J - 5,000 J
Solution
Approximate mass = 60 kg
Approximate velocity = 10 m/s
Approximate KE =
× 60 × 100 = 3000J
KE range ⇒ 2000 to 5000 joule
Approximate velocity = 10 m/s
Approximate KE =
× 60 × 100 = 3000JKE range ⇒ 2000 to 5000 joule
Create a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
A body A experiences perfectly elastic collision with a stationary body B. If after collision the bodies fly apart in th...A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from point A which is at a ...A box of mass m is initially at rest on a horizontal force of mg / 2 is applied to the box directed to the right. the co...Star A has radius r surface temperature T while star B has radius 4r and surface temperature T/2. The ratio of their rad...A bullet of mass m and velocity v is fired into a large block of wood of mass M. The final velocity of the system is :-...