Conceptual Physics-Laws of Motion Unit-Newton's Laws 1/2, Acceleration, and Center of Mass

Question 1

acceleration

Answer 1

change in velocity; speed up; slow down; change direction; stop moving; start moving

Question 2

Newton’s First Law

Answer 2

When forces are balanced, an object at rest will remain at rest, and an object in motion will remain in motion with constant speed in a straight line path.

Question 3

Inertia

Answer 3

the natural tendency of an object to stay at rest or stay in motion

Question 4

How is mass related to inertia

Answer 4

There is a direct relationship between mass and inertia; mass is a measure of inetia

Question 5

What is the unit for acceleration?

Answer 5

m/s/s or m/s^2

meters per second per second

Question 6

What is the formula for acceleration?

Answer 6

acceleration=change in velocity over time

or acceleration=end speed minus start speed over time

Question 7

What is the acceleration of any object due to gravity?

Answer 7

10 m/s/s (exactly 9.8 m/s/s)

32 ft/s/s

Question 8

newton’s Second Law

Answer 8

Objects accelerate when an unbalanced force is applied, in the same direction as and at a speed proportional to the force

Question 9

Does Newton’s Second Law relate to balanced or unbalanced forces?

Answer 9

Unbalanced

Question 10

Give examples from sports when Newton’s first and second laws apply.

Answer 10

Examples: Note- First Law must have all balanced forces, aka, no acceleration except for gravity, Second Law must have an unbalanced force currently being applied.

Question 11

What do you need to balance an object?

Answer 11

You need to support it under it’s center of mass.

Question 12

Center of Mass

Answer 12

the point at which all the mass of the object is considered to be concentrated for calculations concerning the motion of the object

Question 13

Objects balance on…

Answer 13

their Center of Mass