Calculate the speed of a 15.5 kg object which has 250 j of energy.

Answer;

= 5.68 m/s

Kinetic energy = 1/2 mv², where m is the mass and v is the velocity.

K.E = 1/2 mv²

250 J = 1/2 × 15.5 × v²

v² = (250 ×2 )/15.5

v² = 32.2581

v = 5.6796

  ≈ 5.68 m/s

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it