14.4 study guide newtons laws

Question 1

What is always required to overcome inertia?
a. force of friction
b. force of gravity
c. unbalanced force
d. two of the above

Answer 1

unbalanced forces

Question 2

An object at rest will stay at rest as long as the net force acting on it is
a. positive.
b. strong.
c. stable.
d. zero.

Answer 2

zero

Question 3

Inertia causes a moving object to
a. keep moving.
b. stop moving.
c. slow down.
d. speed up.

Answer 3

keep moving

Question 4

The inertia of an object depends on its
a. mass.
b. speed.
c. velocity.
d. direction.

Answer 4

mass

Question 5

The acceleration of an object is inversely related to its
a. mass.
b. speed.
c. weight.
d. velocity.

Answer 5

mass

Question 6

If you apply 10 N of force to a 10-kg object, what will be the object’s acceleration?
a. 10 m/s2
b. 10 N/kg
c. 1 m/s2
d. 1 kg/N

Answer 6

1 m/s2

Question 7

What is the SI unit for momentum?
a. kg/s2
b. kg * m/s2
c. kg * s/m
d. none of the above

Answer 7

none of the above

Question 8

T/F: _____ Newton’s first law of motion applies only to stationary objects.

Answer 8

false

Question 9

T/F: _____ It takes more force to start running than to keep running.

Answer 9

true

Question 10

T/F: _____ It is harder to stop a 60-kg football player than a 40-kg football player if they have the same velocity.

Answer 10

true

Question 11

T/F: _____ An object’s acceleration depends on its mass and speed.

Answer 11

false

Question 12

T/F: _____ If you increase the net force acting on an object, its acceleration also increases.

Answer 12

true

Question 13

T/F: _____ Newton’s second law of motion applies only to objects that are moving.

Answer 13

false

Question 14

T/F: _____ If you know an object’s mass, you also know its weight because mass and weight measure the same thing.

Answer 14

false

Question 15

T/F: _____ Newton’s third law of motion describes how forces act in pairs.

Answer 15

true

Question 16

T/F: _____ When objects collide, momentum is usually lost.

Answer 16

false

Question 17

T/F: _____ Momentum is a type of force.

Answer 17

false

Question 18

Newton’s __________ law of motion is also known as the law of inertia.

Answer 18

____first______

Question 19

A stationary object resists movement because of __________

Answer 19

____inertia______

Question 20

Inertia is greater when objects have greater __________.

Answer 20

_____mass_____

Question 21

Newton’s __________ law of motion relates acceleration to force and mass.

Answer 21

_____second_____

Question 22

An object will accelerate only if the net force acting on the object is greater than __________.

Answer 22

_____zero_____

Question 23

The __________ of an object is equal to its mass multiplied by the acceleration due to gravity.

Answer 23

_____weight_____

Question 24

According to Newton’s __________ law of motion, every action has an equal and opposite reaction.

Answer 24

_____third_____

Question 25

Two objects with the same velocity have the same momentum only if they also have the same __________.

Answer 25

_____mass_____