Free Printable GRAVITATION

1.

Newton said that any two masses will...

a)

combine into a larger mass.

b)

attract each other.

c)

create gravitational fields.

d)

push each other apart.

2.

Which of the following best explains why a person has less weight on top of a mountain?

a)

They are closer to space.

b)

The atmosphere is lighter.

c)

The mountain adds more mass.

d)

The mountain adds more distance.

3.

The amount of matter in an object

a)

mass

b)

weight

c)

inertia

d)

gravity

4.

What states that "every object in the universe attracts every other object"?

a)

Law of Universal Gravitation

b)

Newton's First Law of Motion

c)

My mother

d)

Inertia & gravity

5.

Which of the following is Newton's Law on Gravitation?

a)

F=Gm₁m₂/r

b)

F = Gm₁m₂/r²

c)

F = Gm₁m₂/2r

d)

F = m₁m₂/2r

6.

The moon and other satellites rotate around the earth. Identify the force that keeps these satellites in orbit.

a)

gravity

b)

friction

c)

a strong force

d)

electromagnetic force

7.

Force of gravity is directly proportional to

a)

Mass

b)

Weight

c)

Distance

d)

Time

8.

Two factors effecting the magnitude of the force of gravity between 2 objects are...

a)

mass and distance

b)

mass and matter

c)

distance and weight

d)

weight and mass

9.

Force of gravity is inversely proportional to

a)

Mass

b)

Weight

c)

Distance

d)

Time

10.

If I double the distance between two objects, what happens to their gravitational Force?

a)

4x bigger

b)

4x smaller

c)

2x bigger

d)

2x smaller

11.

What happens to Gravitational force if I double both of the masses but don't change their distance?

a)

doubles

b)

half as big

c)

4x bigger

d)

4x smaller

12.

If I double the mass of one object, but don't change anything else... WHat happens to the gravitational force between two objects?

a)

Doubles

b)

Quadruples

c)

Cut in Half

d)

4x Smaller

13.

which are the following is Newton’s Law of gravitation ?

a)

$W=\frac{GMm}{r}$

b)

$F\ =\frac{GMm}{r^2}$

c)

$V\ =\sqrt{\frac{GM}{r}}$

d)

$g=-\ \frac{GM}{r}$

14.

State the definition of Gravitational field strength

a)

Gravitational force per unit time acting on a body at a point in a gravitational field

b)

The force between two bodies of mass M and m is directly proportional to the product of their masses

c)

Gravitational force per unit mass acting on a body at a point in a gravitational field

15.

what is the unit for Gravitional Field strength, $a_g\ =\frac{GM}{r^2}$

a)

$N\ kg\ ^{-1}$

b)

$J\ kg\ ^{-1}$

c)

$m\ s\ ^{-2}$

d)

$m\ s\ ^{-1}$

16.

A satelite is orbiting about the earth at the height of 45 km from the earth surface. the satelite's velocity is $7.88\ \times10^{3\ }ms^{-1}$ . what is the mass of earth?

a)

$6.0\times10^{26}\ kg$

b)

$6.4\ \times10^{6\ }kg$

c)

$5.56\ \times10^{26}kg$

d)

$6.0\ \times10^{24\ }kg$

17.

A satelite is at a distance, $r$ from the centre of Earth. by using Newton's Second Law of Gravitation, determine the speed, $v$ of the satelite motion

a)

$v\ =\frac{GMf}{m}$

b)

$v\ =\ \frac{GMm}{r}$

c)

$v=2\pi\ \sqrt{\frac{r^3}{GM}}$

d)

$v\ =\ \sqrt{\frac{GM}{r}}$

18.

The gravitational force exerted by an object depends on its

a)

volume

b)

mass

c)

weight

19.

What is the proper setup of the gravitational force formula?

a)

F_g= Gm²/r

b)

F=ma

c)

F_g= Gr²/(m₁+m₂)

d)

F_g= G (m₁m₂)/r²

20.

What happen to the gravitational acceleration to an object if the object is moving from surface of the planets to the outer space?

a)

increases

b)

decreases

c)

unchanged

d)

increase, then decrease

21.

Which of the following is true about geostationary satellite?

a)

Above different geographical location.

b)

The orbital period is longer than 24 hours.

c)

It does not experience any gravitational pull

d)

Its period of rotation is one day.

22.

Please write you answer with unit of years.

(a)

23.

The measure of the pull of gravity on an object is ___________________.

a)

motion

b)

weight

c)

speed

d)

friction

24.

What is the force applied to all objects on Earth?

a)

Earthquakes

b)

Gravity

25.

If Earth's mass was cut in half, what would happen to your mass?

a)

increase because gravitational force increases

b)

decrease because gravitational force decreases

c)

decrease because gravitational force increases

d)

nothing, mass is not affected by gravitational force

GRAVITATION

Total questions: 25

Worksheet time: 20mins

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