Newton's 1st Law
What is Newton's 1st Law of Motion called?
What is Inertia
What is Newton's 2nd Law of Motion? Define it.
The net force on an object is directly related to the object's mass x its acceleration
What is Newton's 3rd law of motion?
For every action there is an equal but opposite reaction
Which of Newton's Laws is described or shown by the table cloth demonstration? How do you know?
Newton's 1st, Inertia, because the stuff on the table is at rest and it remains at rest while the cloth is pulled away.
Who is Newton?
Sir Issac Newton was a scientist in the late 1500 and early 1600 who studied nature and contributed some of the biggest discoveries in physics of all time.
How does inertia explain an object at rest like an elephant sitting down?
What is no unbalanced forces on the elephant
How are mass and acceleration related if the net force on the object is constant?
Indirectly or inversely
What is the reaction force to my force pushing on the floor?
The floor pushes back on me
Which of Newton's 3 laws of Motion is demonstrated by a tug of war? Explain your answer
N3, action-reaction. One team pulls to the left on the rope, the rope pulls back to the right.
What is a Newton?
This is the SI unit of force
What are small unbalanced forces will slowly stop the object but the object continues in a straight line at constant speed unless...
How much net force would be needed to accelerate a 100 kg mass 2 m/s^2?
200 N= (100 kg)x(2 m/s^2)
How can a rocket move in space if there is nothing to push against?
The rocket's exhaust is pushes out the back to it pushes the rocket forward.
Which of Newton's laws explains how a rocket accelerates upward? Explain
F=ma, so the force from the rocket's gases on the rocket cause the rocket's mass to accelerate upward.
Extra: The rocket's mass decreases as more gases exhaust so the rocket's acceleration increases!
How much is a newton?
1 Newton is 0224 lbs
Explain how a tissue box, in the back of a car, will fly to the front of the car if the car slams on its brakes.
The tissue boxes inertia causes it to keep moving at the same speed or velocity unless/until acted upon by unbalanced forces.
If an object's mass increases under a constant acceleration, what happens to its acceleration?
Its acceleration decreases.
If I am standing on the floor (980 N) and my pet monkey jumps onto my back (120 N), how hard does the floor push on my feet?
1100 N
Which of Newton's Laws describe how the moon orbits the Earth? Explain
N1- object in motion stay in motion
N2- The Earth exerts a gravitational force on the moon that causes the moon to accelerate around the Earth
N3- The force of the Earth on the moon is equal but opposite to the force the moon exerts on the Earth
How much is one newton on the moon?
1/6 N or 0.0055 lbs.
What direction will a car skid off of a corner in and what causes this?
Tangent, inertia- continues in a straight line at CM.
A race car driver is accelerating down the straight part of a track. If the car suddenly loses it's roof and trunk lid, what happens to its acceleration?
Its acceleration increases.
If a car runs into a barrier with a force of 2,200 N. How hard does the barrier push on the car?
2,200 N
How do Newton's laws apply to a person on a trampoline? explain all three.
N1- The person resists changing their state of motion so the trampoline must first stop them, then accelerate them in the opposite direction
N2- The trampoline exerts a force on the person who then accelerates upward according to their mass
N3- The person's force on the trampoline is equal but opposite to the tampoline's force on the person
Newton is also famous for his discovery of what other GIANT physics concept or principle?
Gravity