Forces
Vector
Friction
Which Law
Multiple Choice
100
What is a Force?
A push or pull
100
Which statement is correct about vectors:
Vectors have magnitude but no direction
Vectors have magnitude and direction.
#2 Vectors have magnitude and direction.
100
What is friction?
The resistance of motion
100
“ An object in motion will stay in motion or an object at rest will stay at rest unless acted upon by an outside force.”
What is the Law of Inertia (Newton’s 1st Law)?
100
Which force is the strongest force?
A. Weak
B. Strong nuclear
C. Electromagnetic
D. Gravitational
B. (strong nuclear)
200
This is the weakest Force
Gravitational Force
200
This force is only occurs when an object is touching a surface and is equal in magnitude to the weight force.
What is the normal force?
200
This type of friction happens when you hit the brakes
Sliding Frictions
200
For every action, there is an equal and opposite reaction
Newton’s Third Law
200
Which of these answers of the four fundamental forces go to weakest to strongest
Weak, Gravity, Strong, Electromagnetic
Weak, Gravity, Electromagnetic, Strong
Gravity, Weak, Electromagnetic, Strong
Gravity, Weak, Strong, Electromagnetic
3. Gravity, Weak, Electromagnetic, Strong
300
What is the sum of all forces acting on an object called?
Net Force
300
What are the magnitudes of the horizontal and vertical components of the force in the vector diagram below?
FH= 20. N
FH= 14. N
300
A 9.5 N wooden box is pushed across a wooden table. What is the normal force of the wooden box?
9.5 N
300
Which law explains why when you bounce a ball it comes back to you?
Newton's 3rd Law
300
A 40 kg crate is being pushed across a horizontal floor. If the coefficient of friction is .4 what is the frictional force acting on the crate?
16 N
40 N
100 N
160 N
4. 160 N
400
Which unit is equivalent to a Newton?
a) kg m/s2
b) kg2 m/s2
c) kg2 m/s
d) kg2 m2/s2
What is a) kg m/s2
400
A dog walks 4.0 meters due north and then 3.0 meters due east. What is the magnitude of the resultant of the dog's path?
What is 5.0 meters?
400
What is the force of friction between a 600N person skiing down a hill (coefficient of friction=0.05).
30 N
400
When an object experiences an outside unbalanced force it will accelerate in the direction of that force such that acceleration is directly proportional to the force and inversely proportional to the object's mass
Which law is this?
Newton’s second law of acceleration
400
Which object has the greatest inertia?
a 5.00 kg mass moving at 10.0m/s
10.0 kg mass moving at 1.00 m/s
a 15.0 kg mass moving at 10.0 m/s
a 20.0 kg mass moving at 1.00 m/s
4. a 20.0 kg mass moving at 1.00 m/s
500
This is the acceleration of a 0.133 kg eastern gray squirrel with a net force of 0.25 N.
What is 1.88 m/s2?
500
A resultant force of 10. newtons is made up of two complete component forces acting at right angles to each other. If the magnitude of one of the components is 6.0 newtons, the magnitude of the other component must be
What is 8.0 N?
500
What is the coefficient of friction on a 19600 N car experiencing a frictional force of 2940 N?
0.15
500
Fill in the blank:
The gravitational force is _________ proportional to the distance squared.
What is inversely?
500
A 2.5 kg lamp is placed on a 40. N table. If the lamp has a weight of 25 N what force is exerted on the table by the lamp?
a) 0 Newtons
b) 2.5 kilograms
c) 25 Newtons
d) 40 Newtons
What is c) 25 Newtons?
600
An astronaut weighs 8.00 x 102 newtons on the surface of Earth (m=5.9 x 1024 kg). What is the weight of the astronaut 1.27 x 107 meters above the surface of Earth?
What is 2.00 x 102 N?
600
Which terms represent a vector quantity and its respective unit?
a) weight- kilogram
b) mass- kilogram
c) force- newton
d) speed - m/s
What is choice c) force- newton?
600
What is the frictional force on a 15 N wooden block moving on a wooden table (coefficient of friction=0.30)?
What is 5 N
600
The inertia of an object is dependent on this
The object's mass?