Transcript Force and Motion

Force and
Motion
Basketball Review Game
Game Rules
If your team gets the question
right, you get a chance to shoot
the ball into the hoop.
If you get the ball in the hoop,
each person on your team wins
a piece of candy.
The difference between
speed and velocity is that
velocity includes…
a. direction
c. time
b. distance
d. weight
What is the combination of all
forces acting on an object?
a. balanced forces
b. unbalanced forces
c. net forces
d. gravitational forces
As the force pushing two
surfaces together increases, the
friction between the surfaces
a. stays the same
b. decreases
c. increases
d. is not affected
Calculate the net forces acting
on the wheelchair.
a. balanced force of 218 N
b. unbalanced force of 218 N
c. balanced force of 122 N
d. unbalanced force of 122 N
48 N
170 N
Four pairs of objects have the masses
shown below. The objects in each pair
are the same distance apart. The
gravitational force between which pair
of objects is greatest?
a. 1 kilogram and 1 kilogram
b. 1 kilogram and 2 kilograms
c. 2 kilograms and 1 kilogram
d. 2 kilograms and 2 kilograms
s
Which pair from set A has the greatest gravitational
force between them?
a. Pair 1
b. Pair 2
c. Neither pair
d. Both pairs
s
Which pair in set B has the least gravitational
force between them?
a. Pairs 1 and 2 are equal
b. Pair 2
c. Pair 1
d. Neither
s
In set C, why is the gravitational force different even
though the objects have the same mass?
a. Because the velocity is different
b. Their distances are different
c. There is no difference
d. Their masses are different
What are the two factors that
determine gravitational
force?
a. matter and mass
b. speed and mass
c. weight and mass
d. distance and mass
What is the net force and direction
for object B?
a.
b.
c.
d.
5 N left
5 N down
5 N up
5 N right
A
B
C
What is the net force and direction for
object A?
a.
b.
c.
d.
3 N to the left
15 N to the right
9 N to the right
9 N to the left
A
B
C
What is the net force and direction for
object C?
a.
b.
c.
d.
8 N left
8 N right
8 N down
8 N up
A
B
C
In physical science, a push or a
pull is called a(n)
a. force.
b. acceleration.
c. inertia.
d. motion.
What happens when two
forces act in the same
direction?
a They cancel each other out.
b The stronger one prevails.
.
.
c They add together.
d Their sum divided by two is the total
force.
Which of the following causes
an object to start moving?
a. balanced forces
b. unbalanced forces
c. either balanced or
unbalanced forces
d. any combination of forces
When the net forces equal 0 N,
they are which of the following?
a. balanced
b. a push
c. unbalanced
d. a pull
Which of the following is an
example of a balanced force?
A. a baby pushed in a stroller on
a sidewalk
b. a child running down a path
c. a ball rolling down a hill
d. a projector hanging from the
ceiling (like the one in the room )
Which walking surface has the
least friction?
a. sand
b. ice
c. wood
d. carpet
How will the motion of a ball
rolling on the ground change if
the ball encounters a frictional
force?
a. the ball will speed up
b. the ball will slow down
c. the ball’s speed will not
change
d. the ball will change direction
An object in motion has
___________, so it tends to stay in
motion. (Newton’s 1st Law)
a. speed
b. mass
c. acceleration
d. Inertia
Which pair of objects will have
the least gravitational attraction
to each other?
a. two cinder blocks 6 cm apart
b. two marbles 12 cm apart
c. a cinder block and marble 6
cm apart
d. a cinder block and marble 12
cm apart
If a car is slowing down or
changing direction, it must
have…
a. speed
c. acceleration
b. inertia
d. gravity
According to Newton’s 2nd Law
of Motion, any object’s force is
equal to its mass times its…
a. speed
b. gravity
c. velocity
d. acceleration
According to Newton’s 3rd Law
of Motion, any action will have
an equal and _______________
reaction.
a.
b.
c.
d.
balanced
opposite
strong
unbalanced
What is the force of the soccer ball
if the mass is 50 kg and it is
accelerating at 10 m/s2?
a.
b.
c.
d.
5N
5 m/s
500 N
500 m/s