Movin' Right Along
Force
Draw It!
Free Body Diagrams
Vital Vocabulary
100
When an object is not moving, we say it is ____________.
What is "at rest".
100
Double Jeopardy!
When you push a book across a table, you are providing this force.
What is applied.
100
Draw a free body diagram for a water bottle sitting on a table.
What is normal force up and gravity down.
100
The indicator used to represent forces on a free body diagram.
What is an arrow?
100
Double Jeopardy!
A push or pull on an object.
What is a force?
200
The force that always opposes motion.
What is friction.
200
The support force that counteracts gravity.
What is normal force?
200
Draw a free body diagram of a force that accelerates a cart on a rough surface.
What is gravity down, Normal force up, Force applied to the right, Friction force to the left
200
True or False? An object accelerates if it has a net force of zero.
What is false?
200
The sum of all forces acting on an object.
What is net force?
300
A change in motion will occur if the forces acting on an object are _______________.
What is unbalanced.
300
The force responsible for slowing down a skydiver.
What is air resistance?
300
Draw a free body diagram of a box being pushed leftward with a constant velocity
Normal force up, Gravity force down, Force applied to the left and Force of Friction to the right.
300
What a bigger arrow in a free body diagram means.
What is a stronger force (greater magnitude).
300
Units to measure Force
Newtons
400
Double Jeopardy!
An object with balanced forces acting on it is... (2 responses required)
What is at rest or a constant speed?
400
Double Jeopardy!
How much force is required to accelerate a 6 kg mass at 3m/s2
18
400
Double Jeopardy!
Draw a free body diagram of a Projectile acccelerating to the right in midair!
Gravity down, Force applied right
400
Double Jeopardy
Fg means...
Fa means...
Force of Gravity
Force Applied
400
The tendency of an object to resist a change in motion.
Inertia
500
State Newton's First Law. "An object at..."
Newton's first law of motion states that an object will remain at rest or in motion at a constant speed and direction unless an outside force acts upon it.
500
You push a 10 kg cart with 17 N force. What is the acceleration?
1.7
500
Draw a free body diagram of this rocket ship slowing down as it lands. Double Jeopardy!
Force of Gravity not as strong as the Force pushing up
500
This attractive force pulls objects together due to their masses.
Gravity
500
The term we tested when we did a lab breaking sticks. It was also in our reading.
Elastic Limit
600
Over which time frame does the object have a net force? What about zero net force?
0-4 s Net Force
4-7 s No Net Force
7-10 s Net Force
600
What is the normal force on an object that has 20N of gravity pulling down on a surface, and 120N of force from a person pushing down on it?
140 N
600
Draw a free body of a book at rest on an inclined plane.
Gravity down Normal Force up and force of Friction.
600
If a 10kg object changes speed from 10m/s to 20m/s over 2 seconds, what is the force on the object?
50 N.
a = +10/2 = 5
F = 10kg * 5(m/s^2)
F = 50N
600
The force of an object multiplied by the time over which the force was applied
IMPULSE!