Gravitational Field G

What is the equation that links gravitational field strength (g), mass (m) and weight (W)?

• Weight = Mass x Gravitational Field Strength, or W=mg

• Weight = Mass / Gravitational Field Strength, or W=m/g

• Weight = Gravitational Field Strength / Mass, or W=g/m

What is the equation that links gravitational field strength (g), gravitational potential energy (E_g), height (h), and mass (m)?

• Gravitational Potential Energy = Mass x Gravitational Field Strength x Height, or E_g=mgh

• Gravitational Potential Energy = Mass / (Gravitational Field Strength x Height), or E_g=m/(gh)

• Gravitational Potential Energy = Mass x Gravitational Field Strength / Height, or E_g=mg/h

Tags

NGSS.MS-PS3-2

An object is moved from A to B in the gravitational field of Earth. The distance between the centre of Earth and B is twice that of A. If the gravitational potential energy of the object at A is –2.0 MJ, what is the gravitational potential energy of the object at B?

• zero

• -0.5MJ

• -1.0MJ

• -4.0MJ

Tags

NGSS.MS-PS3-2

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?

• Neither, there is no gravity on the moon.

• hammer because it has more mass

• feather because it has less mass

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

Tags

NGSS.MS-PS2-5

The symbol for gravitational field strength is

• GF

• gfs

• g

• G

What is numerically equal to the gravitational field strength at a point P on the Earth's surface?

• the acceleration of free fall at P.

• the change in potential energy per unit distance from P.

• the force acting on any body placed at P.

• the work done in bringing unit mass from infinity to P.

Tags

NGSS.HS-PS2-4

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?

• 4.7 × 10¹⁸ kg

• 5.7 × 10²⁰ kg

• 4.7 × 10²⁴ kg

• 5.7 × 10²⁶ kg

Tags

NGSS.MS-PS2-4

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

• Mass & distance

• Mass & weight

• Gravity & inertia

• Inertia & mass

Tags

NGSS.MS-PS2-4

Two isolated masses m₁ and m₂ are separated by a distance r. Which expression gives the gravitational field strength caused by m₁ at m₂?

• G m1m2 / r

• G m1 m2 / r²

• G m1 / r²

• G m2 / r²

Tags

NGSS.HS-PS2-4

What is the equation for gravitational field strength (g) in terms of gravitational force (F) and mass (m)?

Tags

NGSS.HS-PS2-4