PhysicsLAB CP Workbook
Inertia

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Refer to the following information for the next two questions.

An astronaut in outer space away from gravitational or frictional forces throws a rock.
The rock will
 
The rock's tendency to do this is called
 
The image “http://online.cctt.org/physicslab/content/cpworkbook/page_11HS/page11HSrock.gif” cannot be displayed, because it contains errors.
Refer to the following information for the next question.

The sketch shows a top view of a rock being whirled at the end of a string in a clockwise direction.
 
If the string breaks, the path of the rock is
 
Refer to the following information for the next five questions.

Suppose you are standing in the aisle of a bus that travels along a straight road at 100 km/h, and you hold a pencil still above your head.
Then relative to the bus, the velocity of the pencil is 0 km/h, and relative to the road, the pencil has a horizontal velocity of
 
Suppose you release the pencil. While it is dropping, and relative to the road, the pencil still has a horizontal velocity of
 
This means that the pencil will strike the floor at a place directly
 
Relative to you, the way the pencil drops
 
How does this example illustrate the law of inertia? 

The image “http://online.cctt.org/physicslab/content/cpworkbook/page_11HS/page11HSbus.gif” cannot be displayed, because it contains errors.
Refer to the following information for the next three questions.

Use the words mass, weight, and volume  to complete the table.
The force due to gravity on an object 

The quantity of matter in an object 

The amount of space an object occupies 

Refer to the following information for the next three questions.

Different masses are hung on a spring scale calibrated in newtons. The force exerted by gravity on 1 kg = 9.8 N.
The force exerted by gravity on 5 kg is 

The force exerted by gravity on 10 kg equals 

Make up your own mass and show the corresponding weight. The force exerted by gravity on ____ kg = ____ N. 

Complete the following table based on the object's description.

Object Mass Weight
1-kg melon
1-N apple
14.5-N book
90-kg Uncle Harry


Refer to the following information for the next two questions.

CAUTION: Safety dictates that you do not try this experiment yourself!
Why isn't the girl hurt when the nail is driven into the block of wood? 

Would this be more dangerous or less dangerous if the block were less massive? Explain. 




 
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