# Final: Forces Flashcards

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1
Q

which on the following is not a factor in calculating momentum?

A

acceleration

2
Q

whenever an object is standing still, which value is always zero?

A

speed, momentum, and velocity (all the above)

3
Q

a tug-of-war that results in one team pulling the other across the line is an example of..

A

unbalanced forces

4
Q

a force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn?

A

the object experienced some kind of friction

5
Q

weight is best described as

A

the downward force exerted on an object due to gravity

6
Q

which is used to measure acceleration

A

m/s^2

7
Q

the tendency of an object at rest to remain at rest is

A

inertia

8
Q

the strongest gravitational force occurs between earth and

A

the moon

9
Q

near earth’s surface, an object’s free fall acceleration increases as its

A

none of the above

10
Q

according to Newton’s second law of motion, force is the product of ___ and ____

A

mass & acceleration

11
Q

free fall is the motion of an object resulting from

A

Gravity

12
Q

the value for the acceleration of objects in free fall near earth is

A

9.8 m/s^2

13
Q

when gravitational forces and air resistance equalize on an object that is falling toward earth and the object stops accelerating, it’s velocity is called

A

terminal velocity

14
Q

an object at rest remains at rest unless it experiences an

A

unbalanced force

15
Q

if the car you are riding in comes to a sudden stop, _______ helps stop your forward motion

A

a seatbelt

16
Q

when a satellite orbits earth it experiences 2 motions, _______ motion and _______ towards earth

A

forward, free fall

17
Q

all _______ objects have momentum

A

moving

18
Q

at the time period of an objects momentum change becomes longer, the force needed to cause this change becomes _____

A

smaller