Question

an object of mass 25 kg is at a certain height above the ground. if the potential energy of the object is 490j, find the height at which the object is with respect to the ground .given g=9.8 ms-2
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Answer 1

Answer :

The height at which the object is with respect to the ground is 2m

Step-by-step explanation :

To Find,

• The height

Solution,

Given that,

• Mass of the object = 25 kg
• Acceleration due to gravity = 9.8 m/s·²
• Potential energy = 490 J

Therefore,

As we know that,

Potential energy = m × g × h

Where

• m = Mass
• g = acceleration due to gravity
• h = height

➱ 490J = 25 kg × 9.8 m/s·² × height

➱ h = 490 / 25 × 9.8

➱ h = 490 / 245

➱ h = 2

Hence, the height at which the object is with respect to the ground is 2 m.