Newton's First Law of Motion

Short Answer. Describe how inertia affects motion?

If an object is already at rest, inertia will keep it at rest. If an object is already moving, inertia will keep it moving

Critical writing. Explain how Newton's first law of motion is related to the concept of inertia.

Newton's first law of motion states that an object's motion will not change unless an unbalanced force acts on the object. If the object is at rest, it will stay at rest. If the object is in motion, it will stay in motion. Newton's first law of motion is also called the law of inertia because inertia is the tendency of an object to resist a change in motion. If an object is already at rest, inertia will keep it at rest. If an object is already moving, inertia will keep it moving. Inertia explains why an unbalanced force must act on an object in order for its motion to change.

Short Answer. What is the relationship between mass and inertia?

The inertia of an object depends on its mass. Objects with greater mass have greater inertia

Definition: tendency of an object to resist a change in motion Terms: a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

a

Newton's first law of motion states than an object's motion will not change unless: a. the net force acting on it is greater than zero. b. a force continues to be applied to the object. c. its inertia is stronger than the applied force. d. the object has no inertia.

a

Definition: type of force needed to overcome inertia of an object Terms: a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

b

It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater: a. size. b. inertia. c. volume. d. velocity.

b

An object's velocity will not change unless it is acted on by a(n): a. net force. b. strong force. c. unbalanced force. d. opposite but equal force.

c

Definition: force that opposes the motion of any object Terms a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

c

Overcoming an object's inertia always requires a(n): a. large mass. b. massive force. c. unbalanced force. d. two of the above

c

The direction of a moving object will not change if the net force acting on it is: a. greater than zero. b. less than zero. c. zero. d. two of the above

c

Definition: an object's motion will not change unless an unbalanced force acts on it Terms a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

d

Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for: a. inertia. b. friction. c. an unbalanced force. d. two of the above

d

Definition: factor that determines the inertia of an object Terms a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

e

Definition: combination of all the forces acting on an object Terms a. inertia b. unbalanced force c. friction d. law of inertia e. mass f. net force

f

True or False: A stationary object resists movement only because of gravity.

false

True or False: If the net force acting on an object is zero, its inertia is also zero.

false

True or False: Inertia is the tendency of an object to resist motion.

false

True or False: Newton's first law of motion applies only to objects that are already moving.

false

True or False: Newton's first law of motion is also called the law of acceleration

false

True or False: The inertia of an object is determined by its speed.

false

Fill in the blank. Objects with greater mass have __________ inertia.

greater

Fill in the blank. If an object is not moving, __________ will cause it to remain stationary.

inertia

Fill in the blank. Newton's first law of motion is also called the law of __________.

inertia

Fill in the blank. Once objects start moving, __________ keeps them moving.

inertia

Fill in the blank. When the car you are riding in stops suddenly, you move forward because of __________.

inertia

What is inertia?

the tendency of an object to resist a change in its motion

True or False: If an object is at rest, inertia will keep it at rest.

true

True or False: The speed of an object changes only when it is acted on by an unbalanced force

true

True or False: The tendency of an object to resist a change in motion depends on its mass.

true

True or False: When you are moving at a high rate of speed, inertia makes is hard to stop.

true

Fill in the blank. An object at rest will stay at rest unless a(n) __________ force acts on it.

unbalanced

Fill in the blank. An object's motion will not change as long as the net force acting on it is __________.

zero