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Mini-Quiz of Work Against Gravity and Inertia by an External Force by Ron Kurtus - Succeed in Understanding Physics. Also refer to upward acceleration, velocity, negative work, physical science, School for Champions. Copyright © Restrictions

Mini-Quiz: Work Against Gravity and Inertia by an External Force

by Ron Kurtus (revised 3 February 2011)

Take this Mini-Quiz to check your understanding of the lesson material.

1. How much force is needed to project an object upward?

More than its weight

Equal to its weight

Less than its weight

2. Why is inertia not a factor in lifting an object onto the table?

It is only a factor when dropping an object

Work in slowing the object to zero cancels out the work against inertia in speeding it up

It depends on how high the table is

3. How much work is required to lift a 2 kg weight from the ground to a height of 1 meter?

2 foot-pounds

2 newtons

2 joules

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


Work toward your goals


Resources and references

Author's Credentials

The following resources provide information on this subject:

Websites

Acceleration due to Gravity Calculations - from Western Washington University

Gravity Resources

Books

Top-rated books on Simple Gravity Science

Top-rated books on Advanced Gravity Physics


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