Question

A diver, of mass 40kg, climbs up to a diving platform 1.25m high. What’s her KE

Answer 1

Explanation:

The formula for KE ( Kinetic Energy ) is : 1/2 mv²

Solution:

• First we solve for v ( velocity ) using the formula 2gh, where g is gravity [ 9.8 m/s² ] and h is height [ 1.25 m ]

= 2 ( 9.8 m/s² × 1.25 m ) = 24.5 m/s

• The velocity is 24.5 m/s.

• Now solve for KE using the formula 1/2 mv²

= 1/2 ( 40 kg × 24.5m/s ² )

= 1/2 ( 40 kg × 600.25 )

= 1/2 ( 24,010 )

= 12,005 Joules

• The diver's kinetic energy is 12,005 J.