Physics Unit 3 Blitz

Front

If an object moves around an external axis, it is termed _____

Back

revolution

Front

A change in an object's momentum is due to a(n) _____

Back

impulse

Front

How much power is required to raise a 50 kg sack of flour from the floor to a table one meter high in 2 seconds?

Back

245 Watts

Front

The measurement of work in the English system is in the units of _________

Back

foot-pounds

Front

If you want to measure how much power it took to accomplish work in a certain amount of time, you would use the _____, a unit equivalent to 1 joule of work done in one second.

Back

watt

Front

Define 'revolution' in the context of physics.

Back

The movement of an object around an external axis.

Front

What is 'impulse' in relation to momentum?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time.

Front

Calculate the work done in lifting a 50 kg sack of flour to a height of 1 meter.

Back

Work = Force x Distance = 50 kg x 9.81 m/s² x 1 m = 490.5 Joules.

Front

What is the relationship between power, work, and time?

Back

Power = Work / Time.

Front

What are the units of power in the SI system?

Back

Watts (W), where 1 Watt = 1 Joule/second.