Free Printable OxfordAQA A2 Gravitational Fields

1.

\frac{r^3}{T^2}\ =\

constant, is known as which law?

a)

Newton's law of gravitation

b)

Kepler's first law

c)

Kepler's second law

d)

Kepler's third law

2.

In Fields, The constant of proportionality, G, is called the

a)

gravitational field strength

b)

universal constant of gravitation

c)

Gibb's free energy

d)

acceleration due to gravity

3.

The gravitational force between two objects is (a) proportional to the distance between them

4.

The units of G are

a)

$N\ m^{2\ }kg^2$

b)

$N\ m^{-2\ }kg^{-2}$

c)

$N\ m^{2\ }kg^{-2}$

d)

$N\ m^{-2\ }kg^2$

5.

Newton's Law of Gravitation assumes the masses are point masses. This means that the masses have zero (a)

6.

The value of G is

a)

$6.67x10^{-11}$

b)

$6.67x10^{11}$

c)

$6.67x10^{-1}$

d)

$6.67x10^1$

7.

True or false:

m\ s^{-2}\ =\ N\ kg^{-1}

a)

True

b)

False

8.

True or false:

You and the Earth exert an equal magnitude gravitational force on each other.

a)

True

b)

False

9.

The path which a small mass would follow towards a large mass is called the line of force or (a)

10.

The symbol for gravitational field strength is

a)

GF

b)

gfs

c)

g

d)

G

11.

The unit for gravitational field strength is

a)

$N\ s^{-2}$

b)

$N\ kg^{-1}$

c)

$m\ s^{-2}$

d)

$N\ kg$

12.

What sort of field pattern is shown here?

A (a) field.

13.

Which definition is correct?

a)

Gravitational potential energy is the energy of an object due to its position in a gravitational field.

b)

Gravitational potential energy is the energy of an object due to its position in a magnetic field.

c)

Gravitational potential energy is the energy of an object due to its position in a field.

d)

Gravitational potential energy is the acceleration of an object due to its position in a gravitational field.

14.

The gravitational potential energy is zero at

a)

just above the surface

b)

the surface

c)

infinity

d)

just before infinity

15.

The gravitational potential, V, at a point is the work done to move a small object from (a) to that point

16.

Surfaces of constant potential are called

(a)

17.

True or false:

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

a)

True

b)

False

18.

Which equation shows the gravitational potential, V?

a)

$V\ =\ -\ \frac{G\ M}{r^2}$

b)

$V\ =\ -\ \frac{G\ M}{r}$

c)

$V\ =\ \frac{G\ M}{r^2}$

d)

$V\ =\ \ \frac{G\ M}{r}$

19.

The radius of the Earth is 6400 km
The mass of the Earth is 6 x $10^{24}$ kg

G = 6.67 x $10^{-11}$ N $m^2\ kg^{-2}$

Which is the correct approximation for the escape velocity of the Earth?

a)

12.0 $km\ s^{-1}$

b)

11.5 $km\ s^{-1}$

c)

11.2 $km\ s^{-1}$

d)

10.8 $km\ s^{-1}$

20.

What is the time period of a geostationary satellite?

a)

24 h

b)

12 h

c)

0 h

d)

6 h

OxfordAQA A2 Gravitational Fields

Total questions: 20

Worksheet time: 23mins

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