Newton's Laws
A net force of 10 Newtons is acting on a 5 kg mass. What is it's acceleration?
2 m/s^2
How do you calculate the weight of an object?
mass x 9.8 m/s^2
If you double mass what happens to the force of gravity?
doubles
What is the momentum of a 100 kg object moving at 3 m/s?
300 kgm/s
A bullet is shot out of a gun, how does the momentum of the bullet compare tothe momentum of the gum?
They are the same.
The tendency of an object to stay at rest or continue moving at a constant velocity.
Inertia
What is the Normal Force?
Force exerted on an object by a body with which it is in contact,
If a bug hits a car with a force of 10 Newtons, does the car hit the bug with a smaller, equal or bigger force?
equal
What causes momentum to change?
Forces
What is an elastic collision?
Objects bounce off of each other after the collission.
Which Newton's Law says there is always an equal and opposite reactive force?
Newton's 3rd Law
What is the unit for all forces?
Newtons
Increases
What physics concept explains how airbags work?
Impulse or change in momentum
What is an inelastic collision
Objects stick together after the collision.
If the net force acting on an object is tripled, what happens to the acceleration?
thripled
What is the equation that we use to calculate the force of gravity between 2 objects?
Fg = Gm1m2/r^2
If you double the distance between 2 masses what happens to the gravitational force?
divided by 4
If a 10 Newton force is applied to an object of 20 seconds, what is the objects change in momentum?
200 Ns
What is conservation of momentum?
This principle applies when no net external forces act on the system, meaning the total momentum before an event equals the total momentum after the event.
What does it mean to have a negative force?
Opposite direction to the motion.
What is a free-body diagram?
A drawing that shows all the forces acting on an object using arrows.
An object is sliding down an incline, what happens to it's motion if the incline angle is increased?
Force of gravity parallel increases
Friction decreases
increased acceleration
Explain how airbags work?
Increases time so force decreases
How does object direction affect momentum?
Object direction changes the sign of the velocity and momentum.