Understanding Mass and Weight

The video explains the difference between mass and weight, highlighting that mass is a measure of matter and inertia, while weight is a force dependent on gravitational acceleration. It illustrates how weight changes on different celestial bodies, using Earth, Moon, and Planet X as examples. The video also covers calculating gravitational force and converting weight from pounds to kilograms.

What is the primary difference between mass and weight?

• Mass is measured in newtons, while weight is measured in kilograms.

• Mass is a force, while weight is a measure of inertia.

• Mass changes with location, while weight remains constant.

• Mass is the quantity of matter, while weight is a force due to gravity.

How does the weight of a 5 kg block on the Moon compare to its weight on Earth?

• It weighs more on the Moon.

• It weighs the same on both.

• It has no weight on the Moon.

• It weighs less on the Moon.

Why do astronauts appear to jump higher on the Moon than on Earth?

• The Moon has no gravity.

• The Moon's gravitational acceleration is lower than Earth's.

• Astronauts wear special suits that help them jump higher.

• The Moon's surface is bouncy.

If a person weighs 600 newtons on Earth, how much would they weigh on Planet X with a gravitational acceleration five times that of Earth?

• 600 newtons

• 1500 newtons

• 120 newtons

• 3000 newtons

What is the gravitational acceleration on Planet X if a 12 kg object has a weight force of 588 newtons?

• 49 m/s²

• 9.8 m/s²

• 98 m/s²

• 5 m/s²

How many times greater is the gravitational acceleration on Planet X compared to Earth?

• 10 times

• 5 times

• 2 times

• 3 times

What is the force of gravity acting on a 24 kg object on Earth?

• 24 newtons

• 9.8 newtons

• 480 newtons

• 235.2 newtons

What is the normal force exerted by a table on a 24 kg object at rest?

• 0 newtons

• 235.2 newtons

• 9.8 newtons

• 24 newtons

How do you convert a weight of 225 pounds to newtons?

• Divide by 9.8

• Divide by 4.45

• Multiply by 9.8

• Multiply by 4.45

What is the mass in kilograms of a person who weighs 225 pounds?

• 102.2 kg

• 225 kg

• 50 kg

• 150 kg