Force
Gravity
Relationships
Newton's Laws
Balanced vs Unbalanced Forces
100
What are the four fundamental forces?
1. Electromagnetism
2. Gravity
3. Weak nuclear
4. Strong nuclear
100
What is the measurement of the force of gravity on an object?
Weight
100
As mass increases, the force due to gravity _____
increase, direct relationship
100
What is the Law of Inertia?
An object remains at rest or constant velocity unless acted upon by an unbalanced force
100
If all the forces acting on an object are balanced, the net force and acceleration are both ___?
0
200
What is a force necessary for?
Changing an object's state of motion
200
On Earth, what is the numerical value used to make sure gravity is included in the calculation?
9.8 m/s or 10 m/s
200
As normal force increases, the gravitational force ____
Remains the same
200
What is the Force Law?
When an unbalanced forces acts on an object, the object accelerates in the direction of the resultant force
200
True or False: The forces are unbalanced if the object is going at a constant velocity
FALSE
300
Which statement is false about inertia?
1. Inertia is the tendency of an object to resist change in motion
2. If mass increases, inertia decreases
3. Inertia is a measure of an object's mass
4. Inertia is the object's ability to remain at a constant velocity or rest
2
300
True or False: When dropped from a certain height, a rock will fall faster than a feather
*air resistance not included
False
300
As mass increases, the net force _____
increases
300
What is the Action-Reaction Law?
The force that A exerts on B is equal and opposite to the force B exerts on A
300
Which of Newton's Laws refers to balanced and unbalanced forces?
Newton's Second Law
400
Which object has the greatest inertia?
1. 5kg block moving at 10 m/s
2. 10 kg block moving at 1 m/s
3. 15 kg block moving at 10 m/s
4. 20 kg mass moving at 1 m/s
4
400
As mass increases, gravity ________ .
remains the same
400
As the force of friction increases, the coefficient of friction _____
remains the same
400
True or False: Force equals mass times accelaration
TRUE
400
According to the picture, which set of graphs represent the balanced forces?
1. Top
2. Bottom
1
500
If an object is at rest, is there a force acting upon it?
YES, but the forces are balanced so no motion is seen
500
Which planet has a stronger gravitational pull
Earth or Mars?
Earth
500
As the normal force is increase, the force of friction _____
increases
500
Which of Newton's Laws states: That for every action there is an equal and opposite reaction:
A.1st
B.3rd
C.2nd
D.The Shiflet Law
B
500
What is a net force?
The sum of ALL the forces on an object