WorksheetsFall Check-point
Total questions: 76
Worksheet time: 3hrs 21mins
Whenever an object is moving, there is always this force opposing the motion:
inertia
momentum
friction
applied force
This object would be moving (pick all that are correct):
up
down
left
right
Which of the following is true about this free-body diagram?
the forces are are balanced
the object is free-falling
the object is moving upward
the forces are unbalanced
A deer running 15 meters per second due west
The momentum of an object depends upon the object's ___________&_____________.
size and shape
mass and speed
mass and veloctiy
mass and energy
Determine the momentum of 1,000-kg car moving northward at 20 m/s.
20,000 N
20,000 Joules
20,000 Kg * m/s
20,000 kg * m/s north
When the speed of an object is doubled, its momentum...
remains unchanged in accord with the conservation of momentum.
doubles.
quadruples.
decreases.
Collisions where objects BOUNCE apart.
inelastic collisions
elastic collisions
explosions
none of these
Two Pool Balls collide and then go separate directions.
inelastic collision
elastic collision
explosion
none of these
Collision where objects collide, and stick together.
inelastic collision
elastic collision
explosion
none of these
A ball thrown straight up takes 8 total seconds to complete its journey all the way up and down. 1 second into its journey and 7 seconds into its journey the magnitude of its velocity will be ______________ and its direction _______________.
opposite, the same
the same, opposite
the same, the same
opposite, opposite
The fact that an apple and a watermelon, dropped simultaneously from the same height, would hit the ground at the same time indicates that
you don't like apples or watermelons.
greater masses have greater acceleration.
lesser masses have greater acceleration.
acceleration is independent of mass.
The initial horizontal velocity of a projectile is ____ its final horizontal velocity.
less than
equal to
greater than
What is true about the vertical velocity of a projectile launched horizontally?
It is initially at its maximum value.
It increases due to gravity as it falls.
It remains constant throughout its trajectory.
It decreases as it falls due to gravity.
Which hits the ground first if they start at the same height: a dropped ball or a ball launched with a
horizontal velocity?
the launched ball
the dropped ball
they both hit at the same time
What is the velocity of an object launched straight up at its highest point?
zero
equal to its vx
½ its maximum value
equal to gravity
The path followed by a projectile is also known as its
trajectory
range
height
vertical displacement
Once a projectile is launched, what is the only force that affects its motion?
mass
friction
inertia
gravity
Which of the following statements about the horizontal and vertical components of projectile motion is true?
Changes in the horizontal component occur only when the vertical component changes.
Both the horizontal and vertical components are always constant.
The vertical component changes while the horizontal component stays the same.
The horizontal and vertical components are dependent of each other.
In a projectile motion we always have...
1 component (x)
3 components (x,y, and z)
2 components (x and y)
0 components
