Question

A book with a mass of 3.3 kg sits on a bookshelf. If it has a gravitational
potential energy of 57 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2

Answer 1

AnswEr :

Given that,

• Mass of the Book (M) = 3.3 Kg

• Gravitational Potential Energy (P) = 57 J

• Acceleration Due to Gravity (g) = 9.8 m/s²

We have to find the height of the shelf

We know that,

$\tt P = MgH$

Putting the values,

$\sf \: 57 = 3.3 \times 9.8 \times h \\ \\ \implies \: \sf \: 57 = 32.34 \times h \\ \\ \implies \: \sf \: h = 1.76 \: m \: (approx)$

The height of the shelf is 1.76 m

Answer 2

The height of the shelf is 1.76 m

What is the meaning of mass in the church?

The definition of mass is the Liturgy of the Eucharist or a body of matter or a large number of people or things. An example of mass is a Roman Catholic church service. An example of mass is a pile of clay. An example of a mass is a gathering of thousands of people.

Given that,

Mass of the Book (M) = 3.3 Kg

Gravitational Potential Energy (P) = 57 J

Acceleration Due to Gravity (g) = 9.8 m/s²

We have to find the height of the shelf

We know that,

p = MgH

Putting the values,

57 = 3.3 × 9.8 × h

→ 57 = 33.34 × h

→ h = 1.76 approx

The height of the shelf is 1.76 m

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