English
Maharashtra State BoardSSC (English Medium) 10th Standard

The value of gravitational acceleration at the centre of earth is zero. - Science and Technology 1

Advertisements
Advertisements

Question

The value of gravitational acceleration at the centre of earth is zero.

Options

  • Right

  • Wrong

MCQ
True or False
Advertisements

Solution

The value of gravitational acceleration at the centre of earth is zero- Right

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Gravitation - Right or Wrong sentence

APPEARS IN

SCERT Maharashtra Science and Technology 1 [English] 10 Standard SSC
Chapter 1 Gravitation
Right or Wrong sentence | Q 3

RELATED QUESTIONS

Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?


A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground.


A ball thrown up vertically returns to the thrower after 6 s. Find

  1. the velocity with which it was thrown up,
  2. the maximum height it reaches, and
  3. its position after 4 s.

Explain what is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.


What do you understand by the term 'acceleration due to gravity of earth' ?


Name the force which stops you falling through the floor.


A pressure of 10 Pa acts on an area of 3.0 m2. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?


For freely falling object we can write the Newton’s second equation of motion as …..


Choose one or more correct alternatives.

Which of the forces involved in dragging a heavy object on a smooth, horizontal surface, have the same magnitude?

  1. The horizontal applied force
  2. gravitational force
  3. reaction force in vertical direction
  4. force of friction  

A body is projected vertically upward with an initial velocity u . If acceleartion due to gravity is g , the time for which it remains in air , is : 


An object falling freely from rest reaches ground in 2 s. If acceleration due to gravity is 9.8 m s-2, then the velocity of object on reaching the ground will be 


In vacuum, all freely falling objects have the same force. Is it true?


Explain why:
Objects fall to the earth.


What do you understand by the free fall?


The free fall of an object is possible only in _______.


Write a short note.

Escape Velocity


Write a short note.

Free Fall


The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.


Read the given passage carefully and answer the questions.

We know that the force of gravity due to the earth acts on each and every object. When we were holding the stone in our hand, the stone was experiencing this force, but it was balanced by a force that we were applying on it in the opposite direction. As a result, the stone remained at rest. Once we release the stone from our hands, the only force that acts on it is the gravitational force of the earth and the stone falls down under its influence. Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely. Thus the released stone is in a free fall. In free fall, the initial velocity of the object is zero and goes on increasing due to the acceleration due to the gravity of the earth. During free fall, the frictional force due to air opposes the motion of the object and a buoyant force also acts on the object. Thus, true free fall is possible only in a vacuum.

1) Complete the following statement by choosing the right option.

The stone held in the hand is stable because on it __.

  1. two unbalanced forces are exerted.
  2. only the gravitational force of the earth is exerted.
  3. gravitational force of the earth is not exerted.
  4. two balanced forces are exerted.

2) Why does free fall not happen on the earth?

3) Why does the velocity of the object increase during the free fall?

4) Which type of force exerts on the object during free fall?

5) Why does free fall happen only in a vacuum?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×