Chapter 7 - Forces: Question Preview (ID: 17484)

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What happens when forces act in the same direction on a object?
a) Their strengths are added b) They cancel each other out c) They are multiplied d) The stronger one prevails
_______________ is a measure of the force of gravity
a) mass b) distance c) weight d) inertia
The law of universal gravitation states that any two objects with mass will
a) attract each other b) repel each other c) have not effect on each other d) combine with each other
Forces can only be added if they are
a) acting on the same object b) balanced forces c) unaffected by gravity d) produce friction
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
Force is described by its
a) strength and direction b) direction and velocity c) inertia d) mass
_____________ and ______________ affect the gravitational attraction between objects.
a) mass and distance b) mass and air resistance c) distance and inertia d) distance and friction
According to Newton's 2nd Law of Motion, ____________ depends on the object's mass and the net force acting on the object.
a) acceleration b) friction c) gravity d) inertia
________________ depends on the type of surfaces involved and how hard they are pressed together.
a) friction b) mass c) gravity d) inertia
According to Newton's 3rd Law of Motion, the strength of the reaction force is _____________ the strength of the action force.
a) equal to b) less than c) greater than d) weaker than
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