WorksheetsSE Review Summative
Total questions: 32
Worksheet time: 23mins
The initial horizontal velocity of a projectile is ____ its final horizontal velocity.
less than
equal to
greater than
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
If velocity increases force will....
increase because they have a direct relationship
increase because they have a inverse relationship
decrease
both
A skateboard rolls down a hill, reaches the level surface and eventually comes to a stop. The fact that the skateboard ultimately stops is best explained by ____.
an unbalanced force would be required to keep the sled moving forward at constant speed
the presence of an unbalanced force (e.g., friction) can cause a moving object to stop
the presence of inertia causes it to stop
the natural tendency of any object is to ultimately stop
the tendency of an object to resist a change in its motion
acceleration
inertia
mass
frame of reference
What is the net force?
3 N
3 N, right
17 N, right
3 N, left
A dog plays with a ball. Consider the action force the dog touching the ball. What is the reaction force?
The friction of the ground on the ball.
The ball pushing the ground.
The ground pulling the dog.
The ball touching the dog.
A person is attracted towards the center of Earth by a 440N gravitational force. The force with which Earth is attracted toward the person is
More than 440N
Less than 440N.
The same, 440N.
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is
larger.
the same.
smaller
need more information to say.
If a horse pulls on a wagon at rest, the wagon pulls back equally on the horse. Can the wagon be set into motion?
Yes, because there is a net force acting on the wagon.
Yes, because there is a time delay between action and reaction.
No, because the forces cancel each other.
Yes, because the horse's pull on the wagon is larger than the wagon's pull on the horse.
According to Newton's third law, if you push gently on something, it will push
gently on something else.
on you only if you aren't moving.
gently on you
on something only under the right conditions.
Forces that have a net force of zero Newtons
Balanced force
Unbalanced force
A bola is an old hunting instrument. If three rocks with a combined mass of 0.75 kg are spun at a speed of 20 m/s with a radius of 0.5 m, how much centripetal force is required to keep them spinning.
600 N
45 N
30 N
400 N
Why does an object experiencing uniform circular motion have an acceleration?
because it ir changing speed
because it is changing direction
because it is moving n a straight line
because it has mass
In this diagram, what do the red arrows represent?
the acceleration vector
the velocity vector
the centripetal force vector
the force of gravity
What is this graph representing?
Constant Speed
Acceleration
Deceleration (negative acceleration)
No motion
What motion is represented by the speed-time graph?
Travelling at constant speed, then decelerating.
Accelerating, then decelerating.
Accelerating, then travelling at constant speed.
Traveling at constant speed, then stopping
