Download Q4.1 True or False: An object can move even when there is no force

Q4.1
True or False:
An object can move even when there is
no force on it.
1) True
2) False
3) Don’t know
Q4.2
True or False:
If an object is stationary, there are no
forces on the object.
1) True
2) False
3) Don’t know
Q4.3
True or False:
If there is only one force on an object, it
accelerates.
1) True
2) False
3) Don’t know
Q4.4
True or False:
If an object accelerates, a force must be
acting on it.
1) True
2) False
3) Don’t know
Q4.5
True or False:
If an object isn’t accelerating, no force is
acting on it.
1) True
2) False
3) Don’t know
Q4.6
True or False:
If the net force is in the positive xdirection, the object can only move in the
positive x-direction.
1) True
2) False
3) Don’t know
Q4.7
In (i), a man pulls a force scale attached The force scale in (i)
to the wall. In (ii), the man pulls with the reads 30N. What does it
same force against another man. The
read in (ii)
two men are not moving.
1) 15N
2) 30N
3) 60N
4) Don’t know
Q4.8
A 5000 lb truck is filled with an additional 1000 lbs of birds.
Someone beats on the side of the truck to make the birds fly around.
What is the reading on the scale?
1)
2)
3)
4)
5)
4)
Less than 5000 lbs
5000 lbs
Between 5000 & 6000 lbs
6000 lbs
Greater than 6000 lbs
Don’t know
Q4.9
If you press a book flat against a vertical wall with your hand, in what
direction is the friction force exerted by the wall on the book?
1)
2)
3)
4)
5)
Down
Up
Out from the wall
Into the wall
Don’t know
Q4.10
A friend is sitting on a sled and you
push or pull her along at a constant
velocity.
Which case allows you to
use less force?
1) Pushing her from
behind with a force
that is 30 deg below
the horizontal
2) Pulling an attached
rope with a force that
is 30 deg above the
horizontal.
3) They’re the same force
4) Don’t know