Answer;
= 5.68 m/s
Explanation;
- From the law of conservation of energy, energy is neither created nor destroyed but can be transformed to different forms.
- Therefore when a body is a t rest is has potential energy which is converted to kinetic energy when it starts moving at a certain speed.
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
