Unbalanced forces acting on an object cause it to ______________________________________________ Acceleration depends on the ________________________________________________ Friction is caused by _____________________________________________________________________ The direction of friction force is always in the direction ____________________________________
Unbalanced forces acting on an object cause it to ______________________________________________
Acceleration depends on the ________________________________________________
Friction is caused by _____________________________________________________________________
The direction of friction force is always in the direction ___________________________________________
If an object moves at a constant velocity, the
_______________________________________________________________________________________
Does the force of friction depend on speed? __________________________
Does the force of friction depend on the area of contact? ________________________
In a fluid, does the force of friction depend on speed? _______________________
Explain the difference between mass and weight. ________________________________________________
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The weight of an object is mg, where m = mass and g = ___________________________________________
What is the relationship between mass and inertia? _______________________________________________
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The standard unit for mass is the ______________________________
A 1-kilogram brick weighs about _______________ newtons.
The acceleration of an object depends not only on the force applied but also the _____________ of the object.
State Newton’s Second Law of Motion: ________________________________________________________
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In the equation acceleration=net force/mass, what are the standard units for acceleration, force, and mass?
Acceleration ___________________________
Force _____________________________
Mass _______________________________
On the surface of the Earth, why do objects of different masses fall at the same rate if air resistance is absence?
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In a vacuum, the net force that causes an object to fall is due only to the force of _________________________
What are the two major factors that determine the amount of air drag on a falling object?
- _________________________________________________________________________________
- _________________________________________________________________________________
Explain the term “terminal speed”: ____________________________________________________________
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Consider a man and a woman parachuting together. Their same-size parachutes open at the same altitude above the ground. If the man is twice as heavy as the woman who reaches the ground first and why? (Hint: think of terminal velocity.)
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