Forces and Free Body Diagrams

Quiz
•
Science
•
9th Grade
•
Hard
+3
Standards-aligned
Lisa Thompson
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The free-body diagram shown for an object being pushed to the right across a rough floor at a constant speed has what wrong with it?
The friction force should be in the same direction as the applied force.
The applied force should be the same size as the friction force.
The normal force should be larger than the force of gravity.
There is nothing wrong with this free-body diagram.
Tags
NGSS.MS-PS2-1
NGSS.MS-PS2-2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Look at the following steps for drawing a free-body diagram, and determine what Step 4 should be:
Draw in an arrow for the net force
Calculate the acceleration using the mass of the object
Draw all of the objects that are pushing / pulling at the ends of the arrows
Make sure the length of each arrow correctly represents the strength of the force
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A student is analyzing the forces on a 400 kg car driving at a constant velocity of 20 m/s. What is wrong with the student's force diagram?
The forward force should be 20 N rather than 8000 N since Fnet = m·a
The diagram shows a net force but the net force on the car should be zero
There cannot be any forces on the car if it has a constant velocity so there should be no arrows
There should be more backward force on the car because the care is slowing down
Tags
NGSS.MS-PS2-2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the arrows in this diagram represents the normal force acting on the box?
Arrow A
Arrow B
Arrow C
Arrow D
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Draw a free body diagram for a car moving at a constant velocity on a straight road. Which forces should be included?
Only gravitational force
Gravitational force and normal force
Gravitational force, normal force, and frictional force
Gravitational force, normal force, frictional force, and applied force
Tags
DOK Level 2: Skill/Concept
6.
LABELLING QUESTION
1 min • 1 pt
Label a free body diagram for a book attached to a string.
F tens
F norm
F air
F grav
Tags
NGSS.MS-PS2-4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 10 kg object is at rest on a horizontal surface. A horizontal force of 30 N is applied, and the object accelerates at 2 m/s². What is the frictional force acting on the object?
10 N
20 N
30 N
50 N
Tags
DOK Level 3: Strategic Thinking
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