Force & Friction
Momentum
1st Law
2nd Law
3rd Law
100
What happens to the motion if the net force on an object is zero
there is no change in the object’s motion
100
What is the momentum of a 43 kg jaguar sprinting at a speed of 27 m/s.
1161 kg·m/s
100
The tendency of objects to resist changes in motion
What is inertia
100
A truck with a mass of 1200 kg accelerates at a rate of 3.0 m/s2. What is the net force acting on the truck?
3600 N
100
Action and reaction pairs cancel. True or False?
False
200
What kind of friction does a submarine moving through the ocean experience
fluid
200
In an elastic collision, momentum
is transferred from one object to another
200
Why does a ball rolling across the floor stop rolling?
It has a force acting on it
200
At Target, I push my 40 kg grocery cart. What is the acceleration of my grocery cart if I push it with a force of 60 N?
1.5 m/s2
200
What is the action force in the following situation? A gun shoots a bullet.
gun on bullet
300
You push a box and you are unable to move it. Which force opposes your push?
static
300
Cart A, with a momentum of 2 kg•m/s, crashes into unmoving Cart B. Cart A comes to a stop, what is the momentum of Cart B after the collision?
2 kg•m/s
300
What makes an object change acceleration?
an unbalanced or net force greater than zero
300
What is the mass of a baseball that was thrown with a force of 5 N and has an acceleration of 10 m/s2?
0.5 kg
300
Why do the force pairs (action-reaction) not cancel each other out?
Because the forces act on different objects
400
Place the types of friction in order from greatest to least amount of friction force.
static > sliding > rolling > fluid
400
How is momentum calculated?
mass times speed
400
How does mass affect inertia?
as mass increases inertia increases
400
What is the mass of my 35 kg dog?
35 kg
400
While driving down the road, a firefly strikes the windshield of a bus and makes an obvious mess. The firefly hits the bus and the bus hits the firefly. Which of the two forces is greater?
the force of the firefly is equal to the force of the bus
500
What happens to the force of friction as the mass of an object increases
increases
500
As the mass of an object increases, what happens to the momentum?
it also increases
500
What is acceleration?
change in velocity or direction
500
What is mass and weight?
Mass is the amount of matter an object has and weight is the force of gravity on that object
500
Why do equal forces not always have equal effects?
Newton's 2nd law states that an objects acceleration is equal to the force divided by the mass (a=F/m). The larger the mass the less the change in acceleration.
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