Gravitational Force

Q.

What is meant by gravitational force (or force of gravity )? Give its one example.

Q.

The force of gravity makes the sun to attract the earth toward it, but why the earth is not getting attracted towards the sun, instead it is rotating around the sun.why? Give reason.

Q.

Which type of basic force is responsible for making objects fall, with a constant acceleration near the surface of the Earth?

1. Gravitational force

2. Electromagnetic force

3. Strong Nuclear force

4. Weak Force

Q.
Name the force which is responsible for the downward motion of the man shown in the figure.

1. Magnetic force
2. Gravitational force
3. Normal force
4. Muscular force

Q. How is stability of stars maintained?

Q.

Gravitational force exists betweenyou and a building. Why are you pulled towards the building.?

Q.

A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad (Ignore the frictional force due to air resistance).

Q. Is there any force involve in the rotation of earth?

Q.

The force which pulls all bodies towards the surface of the earth is called _____.

Q.

Why does a stone dropped from a certain height fall on the earth?

Q. List out the physical quantities on which the gravitational force between objects depends. [2 MARKS]

Q. Which of the following force is exerted by Earth on any object having mass?

1. Gravitational force
2. Magnetic force
3. Frictional force
4. Spring force

Q.

If we release a magnet held in our hand, it falls to the ground. The force responsible for this is:
(a) muscular force (b) magnetic force (c) electrostatic force (d) gravitational force

Q.

Which force keeps the members of the Solar System bound to the Sun?

Q. A book is lying on the horizontal table top. If we tilt the table a little, then the book starts sliding down slowly. This happens because:
(a) sliding friction is greater than static friction
(b) sliding friction is less than force of gravity
(c) static friction is greater than sliding friction
(d) force of gravity is less than sliding friction

Q.

Pick the odd one out

Gravitational force, buoyant force, electromagnetic force, upthrust

Q.

How did Einstein Explain Gravity?

Q. Which of the following force is exerted by Earth on any object having mass?

1. Gravitational force
2. Magnetic force
3. Frictional force
4. Spring force

Q.

Which of the following scientists gave the idea of the existence of gravitational force ?
(a) Einstein (b) James Watt (c) Faraday (d) Newton

Q.

Give reasons for the following- why is the gravitational force always considered to be a pull force?

Q.

When a ball is dropped from a height, its speed increases gradually. Name the force which causes this change in speed.

Q. A block of mass media is stationary on a rough inclined plane making an angle Q with the horizontal. Find the contact force between block and the plane

Q.

Gravitational force exists between two persons standing next to each other.

1. True

2. False

Q.

If F₁ is the magnitude of the force exerted on the Sun by Earth and F₂ is the magnitude of the force exerted on Earth by the Sun, then:

1. F1>F2

2. F1=F2

3. None of these

4. F1<F2

Q.

Which of the following is not an example of the force of gravity ?
(a) a leaf falling from a tree. (b) a boy pushing a cart on a level plane.
(c) a diver jumping into a swimming pool. (d) a stone falling from the top of a cliff.

Q. A rocket has been fired upward to launch a sattelite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.

Q. Jacob pushes a box up an inclined plane as shown. What forces must Jacob overcome to push it up the plane?


i. Frictional force
ii. Gravitational force
iii. Electrostatic force

1. i and ii only
2. ii and iii only
3. i and iii only
4. i, ii, and iii

Q.

Any body that has mass attracts every other body towards its centre. So why does any object around us not get attracted towards us. For eg. Why does my friend not attract towards me.

Q. In the given diagram, a person is pushing a box on a rough surface. Identify the pair of forces acting on the box in opposite directions to each other.

Q.

In which of the following cases the net force in NOT Zero?

1. A kite skillfully held stationary in the sky

2. A ball freely falling from a height

3. An aeroplane rising upwards at an angle of $45°$ with the horizontal with a constant speed

4. A cork floating on the surface of water