If the gravitational field strength at a point is 10 N/kg, what is the gravitati

Practice Questions

Q1
If the gravitational field strength at a point is 10 N/kg, what is the gravitational potential at that point assuming it is 2 meters from the mass?
  1. -20 J/kg
  2. -10 J/kg
  3. 0 J/kg
  4. -5 J/kg

Questions & Step-by-Step Solutions

If the gravitational field strength at a point is 10 N/kg, what is the gravitational potential at that point assuming it is 2 meters from the mass?
  • Step 1: Understand that gravitational field strength (g) is given as 10 N/kg.
  • Step 2: Recognize that gravitational potential (V) can be calculated using the formula V = -g * r.
  • Step 3: Identify the distance (r) from the mass, which is given as 2 meters.
  • Step 4: Substitute the values into the formula: V = -10 N/kg * 2 m.
  • Step 5: Perform the multiplication: V = -20 J/kg.
  • Gravitational Field Strength – The gravitational field strength (g) is the force per unit mass experienced by a small test mass placed in the field, measured in N/kg.
  • Gravitational Potential – Gravitational potential (V) is the work done per unit mass to move an object from infinity to a point in the gravitational field, measured in J/kg.
  • Relationship between Gravitational Field Strength and Potential – The gravitational potential is related to the gravitational field strength by the formula V = -g * r, where r is the distance from the mass.
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