Force
Newton's Laws
Collision
Free Body Diagrams and Momentum
More Forces
100
What cases acceleration? Speed, inertia, force, velocity
Force
100
What is Newton’s first law of motion?
Law of inertial. Objects in motion stay in motion unless acted on by an outside force, and object at rest stay at rest unless acted on by an outside force.
100
Two balls of dough collide and stick together. What type of collision is this?
Inelastic Collision
100
In the free- body diagram shown, which of the following is the gravitational force?
14700N
100
Give an example of contact force.
Friction, pushing, pulling
200
What causes a moving object to change directions?
Force
200
What is Newton’s second law of motion?
F = ma
200
What type of collision has two objects stick together and move at a common velocity after colliding.
Inelastic Collision
200
In the free-body diagram what force is the 4050 N representing?
Gravitational Force
200
Give an example of field force (non contact force).
Gravitational force, Magnetic Force, Electromagnetism Force
300
If a nonzero net force is acting on an object what is the object doing?
Being accelerated
300
What causes an object to maintain its state of motion?
Inertia
300
What type of collision happens when two billiard balls collide and bounce off each other going in opposite directions.
Elastic Collision
300
A person was sitting in a wheeled chair. When they stood up the chair rolled backwards. Describe what happened to the chairs momentum.
Was zero when it was stationary and increased when the chair moved.
300
A change in the gravitational force acting on an object will affect the object’s…
Weight
400
Why is force a vector?
static friction. The object has a greater inertia to overcome. Also it is more bonded to the molecules it is on that the object needs to overcome then when it is in motion.
400
What is Newton’s third law of motion?
Every action has an equal but opposite reaction.
Two objects and two forces.
400
What is simultaneous equal but opposite forces resulting from the interacting of two objects.
Action – reaction pairs
400
What is the conservation of momentum?
Momentum is conserved before and after collision or interaction between a force is made.
400
The magnitude of gravitational force acting on an object is measured in?
Weight/pounds
500
A car goes forward along a level road at a constant velocity. What additional force is needed to bring it to equilibrium?
Same force applied backwards to the car.
500
What is inertia?
The property of an object that resists change in its motion.
500
What is the action – reacting pair for a hammer hitting a nail.
The hammer exerts a force on the nail and the nail exerts a force on the nail.
500
In a two body collision what happens to momentum before and after collision?
It is the same. Momentum is conserved before and after collision.
500
What is the unit for Newton’s?
Kg* m/s^2