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WorksheetsForces, Inertia and Gravity
Total questions: 25
Worksheet time: 20mins
Name
Class
Date
1.
What forces cause a planet to orbit?
a)
gravity and orbit
b)
gravity and inertia
c)
gravity and mass
d)
gravity and weight
2.
An astronaut weighs ____ in space.
a)
less
b)
more
c)
the same
d)
100 Newtons
3.
You weigh more on a mountain than in a valley.
a)
True
b)
False
4.
You weigh more on the beach than on a mountain.
a)
True
b)
False
5.
Your mass increases on a large planet with more gravity.
a)
True
b)
False
6.
On Earth, which has a greater gravitational force acting on it?
a)
an iPhone
b)
a laptop
c)
a dog
d)
a car
7.
Gravity on the moon is about 1/6 the gravity felt on the earth. This is because
a)
the moon is much less massive than the earth
b)
the earth has a molten core and the moon doesn't
c)
the moon is so much further from the sun than the earth.
d)
the moon is so far away from the earth
8.
An astronaut's mass ______ in space.
a)
changes
b)
increases
c)
decreases
d)
stays the same
9.
Which of these two affect the pull of gravity on an object?
a)
mass and inertia
b)
mass and distance
c)
mass and force
d)
mass and weight
10.
What would happen to the planets in the solar system if the sun’s gravitational force were to suddenly disappear?
a)
They will stop moving and become static.
b)
They will stop spinning.
c)
They will fly away in straight lines.
d)
They will start moving toward the Sun
11.
Which planet has the greatest attraction to the sun?
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
12.
Which of these best describes why your weight (on Earth) would change on another planet?
a)
Dehydration effects on different planets change weight.
b)
In general, the smaller the planet, the greater weight
c)
Different planets have different gravitational pulls
d)
Weight does not change, no matter where you are.
13.
Which force in the Solar System is similar to the tension in the string?
a)
Friction
b)
Inertia
c)
Force
d)
Gravity
14.
Which has more gravitational force acting upon it?
a)
a bus
b)
a train
c)
a car
d)
a person
15.
Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?
a)
The ball would not roll up the other plane at all.
b)
to nearly the original height
c)
to nearly twice the original height.
d)
to nearly half it original height
16.
After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
a)
twice the force with which it was fired
b)
the same amount of force with which it was fired
c)
1/2 the force with which it was fired
d)
zero, since no force is requires to keep it moving.
17.
An object following a straight-line path at a constant speed
a)
has zero acceleration
b)
has no forces acting on it
c)
has a net force acting in the direction of motion
d)
none of these
18.
Which has more mass, a kilogram of feathers or a kilogram of iron?
a)
feathers
b)
iron
c)
neither
19.
Inertia is a property that the only some material objects possess.
a)
True
b)
False
20.
The force due to gravity is the same no matter where in the universe you are.
a)
True
b)
False
21.
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.
22.
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
23.
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
24.
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
25.
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
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