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แบบทดสอบกฎแรงโน้มถ่วงสากล

Total questions: 10

Worksheet time: 30mins

Name
Class
Date
1.
What is gravitational force?
a)
a force that attracts any object
b)
a force that pushes any object
c)
a force that shrinks any object
d)
a force that enlarges anyobject
2.

Which of the following formulas is the correct equation for the law of Universal gravitation?

a)

F=GM1M2d2F=\frac{GM_1M_2}{d^2}

b)

F=mgF=mg

c)

F=Gd2m1m2F=\frac{Gd^2}{m_1m_2}

d)

F= F=KQ1Q2d2F=\frac{KQ_1Q_2}{d^2}

3.

A person on the Earth weighs 180 pounds. How much will they weigh on the moon? ( Note: The moons "g" is  16\frac{1}{6} times that of Earth)

a)

30 lbs

b)

360 lbs

c)

0- you are weightless in space

d)

18 lbs

4.

If I double the mass of one object without changing anything else, What would happen to the gravitational force between that object and any other object?

a)

Doubles

b)

Quadruples

c)

Cut in Half

d)

 14\frac{1}{4}  as much

5.

Calculate the force of gravity (F) between two objects whose masses are m1 = 100 kg and m2 = 1000 kg if they are separared by a distance of d = 500 m.

 G =6.67×1011 N m2kg2G\ =6.67\times10^{-11}\ N\ \frac{m^2}{kg^2}  

a)

2.67 * 10-11 N

b)

0.4 N

c)

6.67 * 10-11 N

d)

1.3 * 10-8 N

6.

The reason why ocean tides happen is

a)

Electrical forces between the sun and the moon

b)

gravitational forces between the Earth and the moon.

c)

Magnetic forces between the Earth and the moon

d)

Motion of the moon around the earth

7.

What is mass?

a)

How much matter or stuff something has

b)

How much space something takes up

c)

How big something is

d)

How long something is

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.

Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull. 

 G =6.67×1011 N m2kg2G\ =6.67\times10^{-11}\ N\ \frac{m^2}{kg^2}  

a)

3 N

b)

0.0003 N

c)

3000 N

d)

30 N

10.

The Universal Gravitational constant (G) is equal to what?

a)


6.67×1011 N m2kg26.67\times10^{-11}\ N\ \frac{m^2}{kg^2}

b)

9.8 m/s^2

c)

100 N

d)

1.44×106 m1.44\times10^6\ m