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WorksheetsInertia Pre Assessment
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Suppose that an astronaut throws a rock in outer space at a location far from significant influences of gravity and air resistance. One would expect that that the rock would
a)
Eventually stop since all objects ultimately “lose their steam”
b)
Eventually stop as its inertia slowly becomes used up
c)
Continue in motion with the same speed and direction
d)
Either a,b,c… depending on whether the astronaut continues to push it.
2.
Inertia is a force which keeps stationary objects at rest and moving objects in motion at a constant velocity.
a)
True
b)
False
3.
The law of inertia (Newton’s First Law) applies
a)
to both moving and nonmoving objects
b)
only to moving objects
c)
only to objects that are not moving
4.
Mac and Tosh are arguing in the cafeteria. Tosh says that if he flings the Jell-O with a greater speed it will have a greater inertia. Mac argues that inertia does NOT depend upon the speed, but rather upon the mass. Who is correct?
a)
Mac
b)
Tosh
c)
Neither is correct in the concept of inertia
5.
Inertia refers to ___.
a)
The force that keeps stationary objects at rest
b)
The force which keeps moving objects in motion with a constant
c)
The tendency of moving objects to remain in motion
d)
All of the above
6.
A sled slides down a hill, reaches the level surface and eventually comes to a stop. The fact that the sled ultimately stops is best explained by _?__
a)
An unbalanced force would be required to keep the sled moving forward at constant speed
b)
The presence of an unbalanced force (e.g. friction) can cause a moving object to stop
c)
The presence of inertia causes it to stop
d)
The natural tendency of any object is to ultimately stop
7.
When all the individual forces acting on an object are balanced, it is the natural tendency of an object to _?_
a)
Either speed up, slow down or keep the same speed
b)
Either stay at rest or come to a rest position
c)
Accelerate
d)
Keep its velocity constant (either at zero or non-zero value)
8.
An object will not have any inertia if it is _?_
a)
Accelerating
b)
Moving in a circle
c)
In space
d)
… Nonsense! All objects have inertia
9.
A spaceship, located in deep space fires its rockets for 10 s, after which the thrust is turned off. Compare the velocity of the spaceship just after the rockets are turned off to its velocity one minute later.
a)
The velocity is at a maximum as the thrust turns off and slowly decreases as the spaceship travels for the next minute.
b)
The velocity is at a maximum as the thrust turns off and is the same one minute later
c)
The velocity is at a maximum as the thrust turns off and the velocity will be same after one minute. However, if you allowed a longer time to pass, the speed would gradually begin to slow.
d)
A thruster in space will not change the velocity of a space craft, it will only change the direction of its motion
10.
On Earth, more massive objects weigh more than less massive objects.
a)
True
b)
False
11.
The mass of an object on the moon will be the same as the mass of an object on Earth.
a)
True
b)
False
12.
The weight of an object on the moon will be the same as the weight of an object on Earth.
a)
True
b)
False
13.
The weight of an object is mass multiplied by the force of gravity.
a)
True
b)
False
14.
The mass and weight of an object are the same thing.
a)
True
b)
False
15.
The mass of an object is the force of gravity acting upon an object.
a)
True
b)
False
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