Question

1. Find the weight in newton of an iron block of mass 30 kg on (1) Earth (ii) Moon. Take 1 kgf = 10 N. [Ans.: (1) 300 N (i) 50 N] 2. A 9 kg mass weighs 15 N on the Moon. What are its mass and weight on Earth? [Ans.: 9 kg; 90 N]​

Answer 1

Answer:

Explanation:

1. Given:

Mass = 30 kg

1kgf = 10N

To Find:

Weight of the block on earth and on moon

Concept Used:

The acceleration due to gravity on the moon in 1/6th the acceleration of         gravity on earth.

Formula Used:

1. W = mg (on earth)

2. W = mg/6 (on moon)

Solution:

W = 30 * 10 = 300N (on earth)

W = 300/6  = 50 N (on moon)

2. Given:

Mass = 9kg

Weight = 15N(on moon)

To Find:

Weight and mass of the object on earth.

Solution:

Mass = 9kg (on earth), As mass does not change

Weight = 15 * 6 = 90N