Gravitational Field

Easyphysics

Field strength at distance r from point mass M?

Select the correct option:

G M r

G M / r

G M / r²

G / (M r²)

🔒 Solution Hidden from View

Submit your answer to unlock the detailed step-by-step solution.

About This Question

Subject: physics
Chapter: gravitation
Topic: gravitational field
Difficulty: Easy
Year: 2025

Solution

Correct Answer:

G M / r²

Definition: The gravitational field strength ( $g$ ) at a point is the gravitational force experienced by a unit test mass placed at that point.
Formula: $g = \frac{F}{m _{t es t}}$ .
Application: For a test mass $m$ at distance $r$ from source mass $M$ :
- $F = \frac{GM m}{r ^{2}}$
- $g = \frac{GM m / r ^{2}}{m} = \frac{GM}{r ^{2}}$
Result: The field strength is $GM / r^{2}$ , directed toward the source mass.

This easy difficulty physics question is from the chapter gravitation, covering the topic of gravitational field. It appeared in the 2025 exam.

Looking for more practice? Explore all physics questions or browse gravitation questions on RankGuru.

Gravitational Field

Select the correct option:

Solution

🔒 Solution Hidden from View

More gravitational field Practice Questions

Two particles of mass m and 4m are fixed at a separation d on a frictionless table. At what distance...

At a point located at a distance of 2R from the centre of a uniform spherical planet of radius R, th...

Two identical point masses are fixed at the two ends of a straight rod and a test particle is placed...

The gravitational field intensity at a point is 5 N/kg. What force will a 2 kg mass experience at th...

Gravitational field (intensity) is defined as:

About This Question

Solution