Force
Any push of pull that causes a change in motion to an object
force
mass
True/False: All objects in the universe obey Newtons laws of motion
true
_____ is the measure of the force of gravity acting on an object
weight
How do we calculate momentum?
Momentum = mass x velocity
The overall force acting on an object after all forces have been combined.
Net force
What does gravity equal here on Earth
9.8 m/s2
Every action has an equal and opposite reaction
How do we calculate the weight of an object?
Weight = mass x gravity
What will happen to momentum as mass increases?
Momentum will increase
Force that works against the motion of objects that touch as they move past each other.
friction
The gravity on the moon is only 1.62 m/s2. What does this tell you about the moon compared to earth?
it is less massive
Finish the following:
2nd Law of Motion says as force increases, acceleration ___________. It also says when mass increases, acceleration _______________.
2nd Law of Motion says as force increases, acceleration INCREASES. It also says when mass increases, acceleration DECREASES.
What will happen happen to mass if gravity changes?
It will stay the same
What is the momentum of a 10 kg object moving 3.5 m/s? include correct units
10 kg x 3.5 m/s = 35 N-s
When is a net force considered "balanced"?
When all forces combine to equal 0
Compare the fall time of an object dropped and an object with projectile motion.
they fall at the same time
3rd Law
What will be the weight of a 100 kg object here on earth?
980N
object A has a momentum of 50 N-s and hits stationary object B. According to the law of conservation of momentum, what will be the momentum of object A and object B after the collision?
Object A = 0 N-s
Object B = 50 N-s
Law of conservation of momentum says momentum before a collision must equal momentum that comes out of the collision
What is the net force of the rope in this scenario? Is it balanced or unbalanced?
300 N - 300 N = 0 N (Balanced)
Terminal Velocity
Which Law is also known as the law of inertia?
1st Law
An object's weight on Earth is 600N. If the gravity on the moon is 1/6th that of Earth, how much will the object weigh on the moon?
100 N
Which will have greater Momentum; a 0.5 kilogram baseball thrown 20 m/s or a 3 kg bowling ball rolling 2 m/s?
baseball : 0.5 kg x 20 m/s = 10 N-s
Bowling ball : 3 kg x 2 m/s = 6 N-s