Friction is a force that always acts

opposite to an object's motion.

Which of the following is NOT true about Aristotle’s concept of violent motion?

Violent motion is thought to be either straight up or down

The law of inertia applies to

both moving and nonmoving objects.

Which has more mass, a kilogram of feathers or a kilogram of iron?

Neither—they both have the same mass.

After a cannonball is fired into frictionless space, the mag. of force needed to keep it going

zero, since no force is necessary to keep it moving.

If the force of gravity suddenly stopped acting on the planets, they would

move in straight lines tangent to their orbits.

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phy 3 Newtons 1st Law of Motion Inertia Review

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physics newtons 1st Law of motion review

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Answers

1
Compared to its mass on Earth, the mass of a 10-kg object on the moon is
less
more.
the same.
2
An object following a straight-line path at constant speed
has no forces acting on it.
has zero acceleration.
must be moving in a vacuum.
has a net force acting on it in the direction of motion.
3
You would have the largest mass of gold if your chunk of gold weighed 1 N on
Earth.
the moon.
Jupiter.
4
Friction is a force that always acts
in the same direction as an object's motion.
opposite to an object's motion.
perpendicular to an object's motion.
5
Compared to its weight on Earth, a 10-kg object on the moon will weigh
the same amount.
more.
less.
6
The mass of a lamb that weighs 110 N is about
1 kg
110 kg
1100 kg
11 kg
7
Which of the following is NOT true about Aristotle’s concept of violent motion?
Violent motion has an external cause
Violent motion is the result of forces that push or pull
Violent motion is thought to be either straight up or down
Violent motion is imposed motion
8
How much does a 3.0 kg bag of bolts weigh?
22.8 N
14.4 N
7.2 N
29.4 N
9
Which has greater mass an object that weighs 30 N on Earth or 30 N on the moon?
Not enough information to say
The one on the moon
The one on Earth
They have the same mass.
10
The astronomer Copernicus publicly stated in the 1500s that Earth
is slowing down.
revolves around the sun.
does not move.
moves in a straight line.
11
The law of inertia applies to
moving objects.
objects at rest.
both moving and nonmoving objects.
12
A bag of sports equipment has a mass of 10.0 kilograms and a weight of
9.8 N
0.98 N.
98 N
980 N
13
Which has more mass, a kilogram of feathers or a kilogram of iron?
Neither—they both have the same mass.
The feathers
The iron
14
The law of inertia states that an object
will remain at rest unless acted on by an outside force.
cont. at the same vel. unless acted upon by an outside force
that is not moving will never move unless a force acts on it
will do all of the above.
15
One object has twice as much mass as another object. The first object also has twice as much
gravitational acceleration.
inertia.
all of the above
velocity.
16
After a cannonball is fired into frictionless space, the mag. of force needed to keep it going
the same amount of force with which it was fired.
one half the force with which it was fired.
twice the force with which it was fired.
zero, since no force is necessary to keep it moving.
17
Galileo found a ball rolling down an inclined plane rolls how far up another inclined plane?
To about one quarter its original height
To nearly twice its original height
To nearly half its original height
To nearly its original height
18
The force required to maintain an object at a constant speed in free space is equal to
the weight of the object.
the mass of the object.
the force required to stop it.
zero.
19
A sheet of paper can be jerked quickly from under a glass of milk without toppling because.
the milk carton has inertia.
none of the above
the milk carton has very little weight.
gravity pulls very hard on the milk carton.
20
Friction
comes from microscopic bumps that act as obstructions.
all of the above
acts in a direction that opposes the motion of an object.
name given to the force acting between surfaces.
21
If the force of gravity suddenly stopped acting on the planets, they would
continue to orbit the sun.
spiral slowly away from the sun.
spiral slowly towards the sun.
move in straight lines tangent to their orbits.

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