Question

What is the weight, on Earth, of a book with a mass of 1.5 kg?

Answer 1

mass of book =1.5 kg
weight of book =1.5*9.8
=14.7N

hope help u

Answer 2

$\textbf{ Hello Mate! }$

A fact that, weight of body = force of gravity applied on it.

Force = GMm / R²

Here, M is mass of earth and m is mass of book.

Mass of earth = 6 × 10^24 kg

Radius of earth = 6.4 × 10^6 m

Value of G = 6.67 × 10^-11

$F= \frac{6.67 \times {10}^{ - 11} \times 6 \times {10}^{24} \times 1.5 }{ {(6.4 \times {10}^{6} )}^{2} } \\ = \frac{6.67 \times 9 \times {10}^{ - 11 + 24} }{6.4 \times 6.4 \times {10}^{12} } \\ = \frac{60.03 \times {10}^{13 - 12} }{40.96} \\ = 14.7 N$

$\boxed{ \textbf{ Weight of book is 14.7 N }}$

Have great futre ahead!