Question

Q45: Energy of 58,800 J is utilised in raising a body through a vertical
height of 75 m. If g is 9.8 m/sec sq, calculate the mass of the body.​

Answer 1

Explanation,

Given,

• Work done (W) = 58800 J
• Height (h) = 75 m
• Acceleration due to gravity (g) = 9.8 m/s²

To Find,

• The mass of a body.

Solution,

We know that,

W = F × s

Where,

• W = Work done
• F = Force
• s = Displacement

[ °.° F = mg & s = h ]

→ W = mg × h

[ Put the values ]

→ 58800 = m × 9.8 × 75

→ 58800 = m × 735

→ m = 58800/735

→ m = 80 kg

Therefore,

The mass of a body is 80 kg.

Answer 2

$\huge\mathcal\colorbox{lightgreen}{{\color{white}{★ANSWER★}}}$

$\huge\color{lightgreen}{\textbf{\textsf{GIVEN :-}}}$

• Work done (W) = 58800 J
• Height (h) = 75 m
• Acceleration due to gravity (g) = 9.8 m/s²

$\huge\color{lightgreen}{\textbf{\textsf{TO FIND :-}}}$

• The mass of the body.

$\huge\color{lightgreen}{\textbf{\textsf{SOLUTION :-}}}$

We know that,

W = F × s

• W = Work
• F = Force
• S = Displacement

=> W = mg × h

=> 58800 = m × 9.8 × 75

=> 58800 = m × 735

=> m = 58800/735

=> m = 80 kg

Hence, the mass of the body is 80 kg.

Hope it Helps Buddy❤️