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Worksheet: Explaining the Relationship between Mass and Weight

Q1:

What is the gravitational field strength on a planet where an object with a mass of 25 kg has a weight of 300 N?

Q2:

A man standing on the ground applies a force of 735 N to the ground beneath him due to his weight. What is the mass of the man?

  • A 735 kg
  • B 7 2 0 3 kg
  • C 9.5 kg
  • D 75 kg
  • E 150 kg

Q3:

A chair has a mass of 50 kg. What force does the chair’s weight apply to the ground below it?

  • A 9.8 N
  • B 50 N
  • C 560 N
  • D 490 N
  • E 500 N

Q4:

An astronaut on Earth, where the gravitational field strength is 9.8 N/kg, has a mass of 65 kg and a weight of 637 N. The astronaut is sent to a space station, where the gravitational field strength is 9.5 N/kg.

What is the astronaut’s mass on the space station?

What is the astronaut’s weight on the space station?

Q5:

An astronaut who has a mass of 81.25 kg goes to the Moon, where the acceleration due to gravity is 1.6 m/s2. What force does the astronaut’s weight apply to the lunar surface beneath the astronaut’s feet?

Q6:

An astronaut who has a mass of 80 kg goes to Mars. On Mars, the astronaut applies a force of 296 N to the ground beneath her due to her weight. What is the acceleration due to gravity at the surface of Mars?

Q7:

The gravitational field strength of a planet becomes weaker as the distance from the planet’s surface increases. Several thousand kilometers above a planet, its gravitational field strength is 2.4 N/kg. What force, in kilonewtons, toward the planet’s surface is experienced by a spacecraft with a mass of 25 000 kg?