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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
Their strengths are added
B
They are multiplied
C
They cancel each other out
D
The stronger one prevails
2) _______________ is a measure of the force of gravity
A
weight
B
distance
C
mass
D
inertia
3) The law of universal gravitation states that any two objects with mass will
A
repel each other
B
combine with each other
C
have not effect on each other
D
attract each other
4) Forces can only be added if they are
A
unaffected by gravity
B
balanced forces
C
produce friction
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 a greater force on the bat
B
exerts an equal and opposite force on the bat
C
moves at an increasing speed
D
creates friction with the bat
6) Force is described by its
A
inertia
B
mass
C
direction and velocity
D
strength and direction
7) _____________ and ______________ affect the gravitational attraction between objects.
A
mass and distance
B
mass and air resistance
C
distance and inertia
D
distance and friction
8) According to Newton's 2nd Law of Motion, ____________ depends on the object's mass and the net force acting on the object.
A
friction
B
inertia
C
acceleration
D
gravity
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
equal to
C
greater than
D
weaker than
*select an answer for all questions
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