แบบทดสอบกฎแรงโน้มถ่วงสากล

What is gravitational force?

• a force that attracts any object
• a force that pushes any object
• a force that shrinks any object
• a force that enlarges anyobject

Tags

NGSS.HS-PS2-4

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

• $F=\frac{GM_1M_2}{d^2}$

• $F=mg$

• $F=\frac{Gd^2}{m_1m_2}$

• F= $F=\frac{KQ_1Q_2}{d^2}$

Tags

NGSS.HS-PS2-4

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

• 30 lbs

• 360 lbs

• 0- you are weightless in space

• 18 lbs

Tags

NGSS.HS-PS2-4

NGSS.HS-PS2-1

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?

• Doubles

• Quadruples

• Cut in Half

•  $\frac{1}{4}$  as much

Tags

NGSS.HS-PS2-4

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.

 $G\ =6.67\times10^{-11}\ N\ \frac{m^2}{kg^2}$  

• 2.67 * 10^-11 N

• 0.4 N

• 6.67 * 10^-11 N

• 1.3 * 10^-8 N

The reason why ocean tides happen is

• Electrical forces between the sun and the moon

• gravitational forces between the Earth and the moon.

• Magnetic forces between the Earth and the moon

• Motion of the moon around the earth

Tags

NGSS.MS-PS2-4

What is mass?

• How much matter or stuff something has

• How much space something takes up

• How big something is

• How long something is

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

• mass and distance 
• mass and matter
• distance and weight 
• weight and mass

Tags

NGSS.HS-PS2-4

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

 $G\ =6.67\times10^{-11}\ N\ \frac{m^2}{kg^2}$  

• 3 N

• 0.0003 N

• 3000 N

• 30 N

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

• 
  

  $6.67\times10^{-11}\ N\ \frac{m^2}{kg^2}$

• 9.8 m/s^2

• 100 N

• $1.44\times10^6\ m$