Ch. 11 Forces

Question 1

Force is a _____ or ______ that acts on an object

Answer 1

push, pull

Question 2

Force is measured in________

Answer 2

newtons (N)

Question 3

Force has _______ and ________

Answer 3

direction, strength

Question 4

Force causes an object to_______

Answer 4

move

Question 5

If force is applied in the same direction, the object will ___________

Answer 5

speed up

Question 6

If force is applied in the opposite direction the object will___________

Answer 6

Slow down

Question 7

If no force is applied, the object will_________

Answer 7

Continue to move at a constant speed.

Question 8

A force that touches is called a:

Answer 8

contact force

Question 9

Give an example of contact force:

Answer 9

Friction

Question 10

a Force that is applied from a distance is called a_______

Answer 10

non-contact force (doesn’t touch)

Question 11

Give 3 examples of non-contact forces:

Answer 11

Gravity, electricity, magnetic

Question 12

Motion _____ when an object speeds up, slows down, or changes direction.

Answer 12

changes

Question 13

When an object speeds up or changes direction:______

Answer 13

acceleration

Question 14

The ______ the force, the _______ the acceleration.

Answer 14

greater

Question 15

Newton’s 1st Law of Motion

Answer 15

motion will stay the same unless a force is applied.

Question 16

If an object is sitting, it will stay still if no force is applied. This is an example of:

Answer 16

Newton’s 1st Law of Motion

Question 17

Your body rises out of your seat at the top of a hill on a roller coaster because it wants to continue going upward. This is an example of:

Answer 17

Newton’s 1st Law of Motion

Question 18

Newton’s 2nd Law of Motion

Answer 18

Force can cause an object to speed up, slow down, or change direction.

Question 19

More mass - ______influence force has on motion

Answer 19

less

Question 20

True or False: A larger mass is harder to more and stop than a smaller mass.

Answer 20

true

Question 21

True or False: If the forces are the same (balanced) the object will keep moving at the same speed and direction.

Answer 21

true

Question 22

Newton’s 3rd Law

Answer 22

When one object exerts a force on a second object, the second object exerts a forceww on the first.

Question 23

Give an example of Newton’s 3rd Law:

Answer 23

Bumper cars

Question 24

True or False: If you drop 2 objects in a place with no air (vacume) they will both fall at the same speed.

Answer 24

True

Question 25

Movement/Motion is measured by_____.

Answer 25

speed.

Question 26

speed = Distance/_______

Answer 26

time

Question 27

_____=Distance/time

Answer 27

speed

Question 28

speed = ________/time

Answer 28

distance

Question 29

Simple Machine:

Answer 29

a device made of one or two parts that helps you do work.

Question 30

Simple machines _______ the amount of force requiired or the direction of a force.

Answer 30

change

Question 31

Name 6 types of simple machines:

Answer 31

lever
pully
wheel
inclined plane
wedge
screw

Question 32

Lever:

Answer 32

a bar moves around a fixed point

Question 33

Give examples of levers:

Answer 33

nutcracker, seesaw, wheelbarrow

Question 34

Pulley

Answer 34

rope around a wheel

Question 35

Give an example of a pulley

Answer 35

flag on a flag pole is raised using a pully

Question 36

Inclined plane:

Answer 36

flat surface with one end higher than the other

Question 37

Give an example of an inclined plane:

Answer 37

ramp

Question 38

Wedge:

Answer 38

made of one or two inclined planes.

Question 39

Give an example of a wedge:

Answer 39

axe

Question 40

Screw:

Answer 40

a smooth cylinder with an inclined plane wrapped around it.

Question 41

Give an example of a screw:

Answer 41

screw