Force and Motion 1
Type of Friction
Forces & Free Body Diagrams
Newton Laws
Momentum
100
What is a force?
push or pull
100
Name the type of friction. You are pushing against a wall and it won't move.
static friction
100
If the net force equals zero, is it balanced or unbalanced?
balanced
100
Describe the three statements for Newton Laws.
1st Law - If an object is at rest, then it remain at rest until an force acts on it.
2nd Law - There's a relationship b/w mass and acceleration depending the amount of force acting on the object.
3rd Law - A reaction causes an equal or opposite reaction.
100
What is the basic formula to calculate momentum?
p=mv
200
What formula would you use to find time?
distance / speed
200
Name the type of friction. You are roller skating down the street.
Rolling Friction
200
If there is movement, is the force balanced or unbalanced?
unbalanced
200
What is the formula to calculate Newton's 2nd Law of Motion?
F=ma
200
A bicycle has a momentum of 36 kg • m/s and a velocity of 4 m/s. What is the mass of the bicycle?
9 kg
300
What is the net force?
What is 0 Newtons?
300
Name the type of friction. Walking on a wet floor.
Fluid Friction
300
The Indigo and the Navy Teams are having a tug of war. The Navy Team pulls 25 N left and the Indigo Team pulls 47 N right. What is the net force? (Remember to give the direction also.) Is it balanced or unbalanced?
22N Right Unbalanced
300
What net force is needed to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg? be sure to include the unit.
6,000 N
300
A football player has a mass of 65 kg and is moving with a velocity of 5 m/s. What is the player’s momentum?
325 kg/ms
400
Which statement describes the force diagram?
a. The forces are balanced.
b. The box will move to the right.
c. The box will move to the left.
d. The forces are unbalanced.
a. The forces are balanced.
400
Name the type of friction. Sledding down a hill
Sliding Friction
400
Calculate the Net Force from the Free-Body Diagram. Include the direction, unit, and determine if it is balanced or unbalanced.
0N, Balanced
400
This Law states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's 1st Law
400
The diagram shows two balls before they collide.
What is the momentum of the system after the collision?
.
0.2 kg • m/s
500
How will this object move?
What is it will move to the right?
500
You are sliding your desk across the classroom and it creates a loud noise. You don't want it to be so loud the next time. What could you do so that it's easier to move the desk? What type of friction is this?
Add wheels to the desk. Rolling Friction
500
Calculate the Net Force from the Free-Body Diagram. Include the direction, unit, and determine if it is balanced or unbalanced.
5N, to the left.
500
According to Newton’s Second Law, if the force increased but the mass remained the same, what happened to object motion?
The objects acceleration increased.
500
Two football players are running toward each other. One football player has a mass of 105 kg and is running at 8.6 m/s. The other player has a mass of 90 kg and is running at -9.0 m/s.
What is the momentum of the system after the football players collide?
93 kg/ms