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Chapter 7 - Forces
Test Description: Forces (Friction, gravity, Newton's Laws)
Instructions: Answer all questions to get your test result.
1) What happens when forces act in the same direction on a object?
A
They cancel each other out
B
Their strengths are added
C
The stronger one prevails
D
They are multiplied
2) _______________ is a measure of the force of gravity
A
inertia
B
distance
C
mass
D
weight
3) The law of universal gravitation states that any two objects with mass will
A
have not effect on each other
B
attract each other
C
repel each other
D
combine with each other
4) Forces can only be added if they are
A
unaffected by gravity
B
produce friction
C
balanced forces
D
acting on the same object
5) According to Newton's 3rd Law of Motion, when a baseball bat strikes and exerts a force on a ball, the ball
A
exerts an equal and opposite force on the bat
B
exerts a greater force on the bat
C
moves at an increasing speed
D
creates friction with the bat
6) Force is described by its
A
direction and velocity
B
inertia
C
mass
D
strength and direction
7) _____________ and ______________ affect the gravitational attraction between objects.
A
mass and distance
B
distance and inertia
C
distance and friction
D
mass and air resistance
8) According to Newton's 2nd Law of Motion, ____________ depends on the object's mass and the net force acting on the object.
A
gravity
B
friction
C
inertia
D
acceleration
9) ________________ depends on the type of surfaces involved and how hard they are pressed together.
A
inertia
B
friction
C
mass
D
gravity
10) According to Newton's 3rd Law of Motion, the strength of the reaction force is _____________ the strength of the action force.
A
less than
B
greater than
C
weaker than
D
equal to
*select an answer for all questions
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