Free Printable physics unit 1 quiz

1.

Saturn has a surface field strength of 10.4 N kg⁻¹ and a radius of 6.03 × 10⁴ km. What is the mass of Saturn?

a)

4.7 × 10¹⁸ kg

b)

5.7 × 10²⁰ kg

c)

4.7 × 10²⁴ kg

d)

5.7 × 10²⁶ kg

2.

If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?

a)

Neither, there is no gravity on the moon.

b)

hammer because it has more mass

c)

feather because it has less mass

d)

both will hit at the same time, there is no wind resistance

3.

What does the strength of gravity between two objects depend upon?

a)

Mass & distance

b)

Mass & weight

c)

Gravity & inertia

d)

Inertia & mass

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.

Force acting on two point masses is directly proportional to

a)

sum of masses

b)

difference of masses

c)

distance between masses

d)

product of masses

6.

At which point does the ball has the greatest Gravitational field?

a)

A

b)

G

c)

D

d)

C

e)

G

7.

Find the force due to gravity if the mass of the object is 2300 kg and the mass of the other object is 4000 kg. The distance between the two objects is 0.150 m.

a)

4.09 x 10^-3 N

b)

244 N

c)

2.7 x 10^-2 N

d)

6.14 x 10^-4 N

8.

What would the gravitational force be between the Sun and Mars if they were 2.3 x 10¹¹m apart? The masses for the Sun and Jupiter are 1.99 x 10³⁰kg and 6.42 x 10²³kg, respectively.

a)

F_g = 3.8 x 10¹⁵N

b)

F_g = 2.8 x 10^-42 N

c)

F_g = 1.6 x 10²¹ N

d)

F_g = 4.6 x 10^-75N

9.

Compute g for the surface of a planet whose radius is double that of Earth and whose mass is triple that of Earth.

g on earth's surface is

a)

1.64 m/s²

b)

7.36 m/s²

c)

9.81 m/s²

d)

14.7 m/s²

10.

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 $km\ s^{-1}$

11.

True or false:

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

a)

True

b)

False

12.

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

13.

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.

a)

1 N*s

b)

6 N*s

c)

33.3 N*s

d)

None of these

14.

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

a)

0.1 kg-m/s

b)

1 kg-m/s

c)

10 kg-m/s

d)

100 kg-m/s

15.

According to Newton’s second law of motion, if force remains the same but mass increases, then acceleration will

a)

increase

b)

decreases

c)

remain constant

16.

The force of friction on a sliding object is 10 newtons. The applied force needed to maintain a constant velocity is

a)

Less than 10N

b)

More than 10N

c)

10N

17.

A 10kg block with an initial velocity of 10m/s slides 10m across a horizontal surface and comes to rest. It takes the block 2 seconds to stop. The stopping force acting on the block is about

a)

5N

b)

10N

c)

25N

d)

50N

18.

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of $3.5m/s^2$ .

a)

$2.4\ m/s\$

b)

$3.6\ m/s$

c)

$3.9\ m/s$

d)

$4.2\ m/s$

19.

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

a)

10 N

b)

20 N

c)

30 N

d)

40 N

20.

A bicycle has a period of 0.3s . What is the

speed of its tires if their radius is 30 cm?

a)

6 m/s

b)

3 m/s

c)

60 m/s

d)

30 m/s

physics unit 1 quiz

Total questions: 20

Worksheet time: 23mins

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