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Experiment Design, Forces And Work
Test Description: Review
Instructions: Answer all questions to get your test result.
1) A force ...
A
is the amount of work done.
B
always causes on object to move.
C
is a push or a pull.
D
can be measured in kilograms.
2) If forces are in the same direction,
A
you add them to get the net force.
B
they will have the same acceleration.
C
they are always equal.
D
you subtract them to get the net force.
3) If forces are in opposite directions,
A
you add them to get the net force.
B
they will have the same acceleration.
C
they are always equal.
D
you subtract them to get the net force.
4) If the net force on an object is 60 N, then
A
the forces acting on it are balanced.
B
the forces acting on it are unbalanced.
C
it will not move.
D
there is only force acting on it.
5) If the net force on an object is 0 N, then
A
it will move.
B
the forces acting on it are unbalanced.
C
there are several forces acting on it.
D
the forces acting on it are balanced.
6) Emmy pushes on a box with 10 N of force to the left, while Claire pushes on the box with 8 N of force to the right. What will happen to the box?
A
Not enough information to determine if the box will move or not.
B
It will move to the left.
C
It will move to the right.
D
It will not move.
7) Work occurs when
A
a force is applied to an object and the object moves
B
a force is applied to an object and the object moves in the opposite direction of the force
C
an object moves
D
a force is applied to an object and the object moves in the direction of the force
8) You are dribbling a basketball down the court and pass the ball to your teammate. When did WORK occur on the ball?
A
only when you dribbled the ball
B
when you dribbled the ball and when you threw it down court to your teammate
C
when you held the ball
D
when you dribbled the ball and when your teammate caught it
9) At the end of science class, you pick up your binder and carry your things to your next class. When did WORK occur?
A
when you picked up the binder
B
when you picked up the binder and carried it to your next class
C
there was no work done
D
when you carried it to your next class
10) You pull on a locked door as hard as you can. Why wasn't there any work done?
A
the door was broken
B
WORK was done on the door
C
because you pulled on the door
D
the door did not move
11) Why do people use ramps to move heavy objects?
A
Because it takes more force to move an object up a ramp than lifting it
B
Because they are lazy
C
Because it would decrease the distance you had to move the object
D
Because it takes less force to move an object up a ramp than lifting it
12) When you use a ramp, it takes less force but you have to
A
push harder
B
move the object a greater distance
C
accelerate the object more
D
make sure the ramp is twice as long as the mass of the object
13) The WORK done when using a ramp
A
can't be determined
B
is less than when you lift the object straight up.
C
is the same as when you lift the object straight up.
D
is more than when you lift the object straight up.
14) What is formula for work?
A
Work = mass x distance
B
Work = Force x acceleration
C
Work = Force / distance
D
Work = Force x distance
15) What unit is WORK measured in?
A
Joules
B
Newtons
C
Celsius
D
Calories
16) If you pull a wagon with 25 N of force over a distance of 5 m, how much work have you done?
A
no work was done
B
5 J
C
125 J
D
29 J
17) The one factor that is changed in an experiment is the
A
control
B
independent variable
C
observation
D
dependent variable
18) When designing an experiment, how many independent variables should you have?
A
three
B
one
C
four or more
D
two
19) What you measure or observe to obtain your results. (In the video, it would have been when they measured the height of the plants after Spring Break.)
A
independent variable
B
control
C
conclusion
D
dependent variable
20) Factors in an experiment that stay the same. (In the video, it would have been the amount of sunlight, type of soil, type of pot, type of plant, temperature of room, etc.)
A
control
B
factor
C
data
D
hypothesis
*select an answer for all questions
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