Gravitation

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

• $W=\frac{GMm}{r}$

• $F\ =\frac{GMm}{r^2}$

• $V\ =\sqrt{\frac{GM}{r}}$

• $g=-\ \frac{GM}{r}$

Tags

NGSS.HS-PS2-4

State the definition of Gravitational field strength

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

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

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

Tags

NGSS.MS-PS2-5

Newtton's Law of Gravitation states a mangnitude of an attractive force between two point masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

what is it related to ?

• Newton's 1st Law of motion

• Newton's 2nd Law of motion

• Newton's 3rd Law of motion

Tags

NGSS.HS-PS2-4

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

•  $N\ kg\ ^{-1}$  

•  $J\ kg\ ^{-1}$  

•  $m\ s\ ^{-2}$  

•  $m\ s\ ^{-1}$  

Tags

NGSS.HS-PS2-4

Newton said that any two masses will...

• combine into a larger mass.

• attract each other.

• create gravitational fields.

• push each other apart.

Tags

NGSS.HS-PS2-4

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

• Object A

• Object C

• A and C exert an equal force on B

• Cannot be determined

Tags

NGSS.HS-PS2-4

A massive object and a less massive object exert a gravitational force on each other. Which of the following picture correctly shows the magnitude and direction of the forces involved in this interaction?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-4

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?

•  $6.0\times10^{26}\ kg$  

•  $6.4\ \times10^{6\ }kg$  

•  $5.56\ \times10^{26}kg$  

•  $6.0\ \times10^{24\ }kg$  

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

the gravitation force of a particle X of mass  $m_1$  on another particle Y mass  $m_2$ is  $F_1$  . the gravitational force of Y on X is $F_2$  . if  $m_1>m_2$  , which of the following statements about the gravitational force  $F_1$  and  $F_2$  is correct ?

• magnitude of $F_1$  is greater than the magnitude of  $F_2$  

•  $F_{1\ }$  and  $F_2$  in same directions

•  $F_{1\ }$  and  $F_2$  act along the line joining  $m_1$  and  $m_2$  

•  $F_1$  and  $F_2$  form an potential energy pair

Tags

NGSS.HS-PS2-4

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

•  $v\ =\frac{GMf}{m}$  

•  $v\ =\ \frac{GMm}{r}$  

•  $v=2\pi\ \sqrt{\frac{r^3}{GM}}$  

•  $v\ =\ \sqrt{\frac{GM}{r}}$  

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4