What is the weight of an object that has a mass of 20kg

Short Note

An object has mass of 20 kg on earth. What will be its (1) mass, and (2) weight, on the moon ? (g on moon = 1.6 m/s2).

Advertisement Remove all ads

Solution

(i) Mass on moon = 20 kg (mass remains constant everywhere)
(ii) W (Weight of the object on moon) = ?
m (mass of the object) = 20kg
g (acceleration due to gravity on moon)= 1.6 m/s2
W= mg
= 20×1.6
= 32 N
Answer: Weight on moon = 32N

Concept: Mass and Weight of an Object

  Is there an error in this question or solution?

Advertisement Remove all ads

Chapter 3: Gravitation - Very Short Answers 1 [Page 102]

Q 47Q 46Q 48

APPEARS IN

Lakhmir Singh Science Class 9 Physics

Chapter 3 Gravitation
Very Short Answers 1 | Q 47 | Page 102

Video TutorialsVIEW ALL [1]

• 
  view
  Video Tutorials For All Subjects
• Mass and Weight of an Object

  video tutorial

  00:34:49

Advertisement Remove all ads

As given, the mass of the object on the earth $m_e=20\  kg$

Gravitational acceleration on the moon $g=1.6\ m/s^2$

(i). As known, the mass of an object remains constant. Therefore, the mass of the object on the moon will be $20\ kg$.

(ii). Weight of the object on the moon $W_m=mg$

$=20\ kg\times1.6\  m/s^2$

$=32\ N$

Therefore, the weight of the object on the moon is $32\ m/s^2$.

#F_G~~196" N"# (downward)

Explanation:

The equation for the force of gravity acting on a stationary object at or near the surface of the earth is given by:

#F_G=mg#

We have the following information:

• #|->m=20" kg"#
• #|->g=9.81" m"//"s"^2#

Therefore:

#F_G=(20" kg")(9.81" m"//"s"^2)#

#=196.2" N"#

#~~color(darkblue)(196" N")# (downward)

What is weight of an object with mass of 20 kg?

What is the weight of an object whose mass is 20kg what will be its mass and weight on the surface of moon?

What is the weight of a 20 kg box on Earth?

What is the weight of box with book if it has a 20 kg mass?

What is the force of a 20 kg?

How do you find the weight of an object with mass?