Question Text
Question 1 :
Weight of a body is a scalar quantity. True or false.
Question 2 :
Why is the weight of an object less on the moon than on earth?
Question 3 :
Value of 'g' on moon is _________ of the value of 'g' on earth. Fill in the blank.
Question 6 :
The weight of 50 kg person at the surface of earth is ................
Question 7 :
The radius of Earth is about $6400\ km$ and that of Mars is $3200\ km$. The mass of the Earth is about $10$ times mass of Mars. An object weighs $200\ N$ on the surface of Earth. Then its weight on the surface of Mars will be:
Question 8 :
An iron ball is weighed in air and then in water by a spring balance:<br>
Question 9 :
<p>A body falls for $5s$ from rest. If the acceleration due to the gravity of earth ceases to act, The distance travels in the next $3s$ is.</p>
Question 10 :
What force and weight act on a mass of $10.5 kg$ being pulled by earth? Take $g=10  m  {s}^{-2}$.
Question 11 :
'Weight' of a body may have the following attributes.<br>I. It is the gravitational force acting on a body at the earth's surface<br>II. It is independent of the mass of the body<br>III. The body is weightless during free fall<br>IV. It is different at different places on earth's surface.<br>
Question 12 :
A $60kg$ man is inside a lift which is moving up with an acceleration of $2.45\ {ms}^{-2}$. The apparent percentage change in his weight is: