Gravity

Q.

What is the collective noun of Angels

Q.

Why do sea waves get stronger at night?

Q.

An astronaut standing on the surface of the moon throws a ball upwards. The ball would

1. Directly fall down from the point it is released.

2. Hang in space.

3. Go up and then come back to the surface of the moon.

4. Keep going up never to come back.

Q. Which of the following is not an application of an artificial satellite?

1. Space travel
2. Telecommunication
3. Weather forecasting
4. Remote sensing

Q. A person is standing at the bottom of the Earth. In which direction he will experience the pull?

1. 
2. 
3. 

Q. Which of the following statements are correct about the Sun?

Note: This question has more than one correct answer.

1. Closest star to the Earth
2. Main source of heat for Earth
3. Made up of gases
4. Smallest star in our galaxy

Q. Two satellite of mass m1 and m 2(m1>m2) are going around the earth in orbit of radius r1 and r2( r1>r2) then find relation of their velocity?

Q. On Earth, when the ball is thrown up, it will .

1. fall back to ground
2. disappear in air
3. float in air

Q.

Name the kind of force which acts on a stone thrown vertically upward.

Q. On the Earth, when a ball is thrown upwards it falls back on to the ground.

1. True
2. False

Q. Why do astronauts keep floating in the spaceship?

1. They feel Earth's gravity.
2. There is air all around in space.
3. They don't feel Earth's gravity.
4. They wear floatation suit.

Q. Write some uses of artificial satellites.

Q. Where is the highest probability to find asteroids in bulk?

1. Between Jupiter and Saturn
2. Between Earth and Mars
3. Between Mars and Jupiter
4. Between Mercury and Venus

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

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

Q. Assertion: Artificial satellites are not necessary for long distance TV transmission
Reason: TV signals are not reflected by the ionosphere. They are reflected back to the earth from an earth station by artificial satellites

1. A and R are true and R is the correct explanation of A
2. A and R are true but R is not correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q. On the Earth when a ball is thrown up, it will _____________.

1. disappear
2. keep moving upwards
3. fall down on the Earth
4. float in the air

Q. Earth exerts a __________ pull on every object on Earth.

1. upward
2. downward
3. leftward
4. rightward

Q. An apple falling from a tree is an example of:

1. Floatation
2. Gravity
3. Sinking
4. Revolution

Q. Imagine that your classroom is in space. Which of the following situation will you experience?

1. Your hair will be pointing upwards.
2. You are able to sit in one place.
3. Your bags and books are floating around.
4. Your food is floating around.

Q. Which of the following incident takes place on Earth?

1. Hair keeps standing
2. Food floats in air
3. Apple falls on the ground
4. Water floats as blobs

Q. How did Sunita describe her view of Earth from space?

1. Dull and Boring
2. Huge and Ugly
3. Beautiful and Amazing
4. None of these

Q. How long approximately does it takes for the new Moon to form from a full moon day?

1. 15 days

2. 27 days

3. 7 days
4. 20 days

Q. An apple falling from a tree is an example of:

1. Gravity
2. Floatation
3. Sinking
4. Revolution

Q. If there is no gravity on Earth, every object on Earth will ________.

1. stop moving
2. start floating
3. fall down
4. start rotating

Q. Mention any six instances of gravity that we observe in our daily lives.