Formulas
What is the formula for work?
A) F x D
B) M X A
C) W/F
D)M/A
A) F x D (Force x Distance) is the formula for work
What is a unit of distance?
A) Hours
B) Miles
C) Kg
D) d/t
B) Miles are a unit of distance
Fill in the blanks.
An object at rest will stay at rest and an object in (____) will stay in (____) unless acted upon by an unbalanced (____)
A) (motion), (motion), (force)
B) (motion), (motion), (inertia)
C) (space), (orbit), (gravity)
D) (motion), (motion) (speed)
A) (motion), (motion), (force)
An object at rest will stay at rest and an objects in (motion) will stay in (motion) unless acted upon by an unbalanced (force)
Newtons 1st Law
Define Mass
A) The amount of force required to move something
B) A measurement of how big something is
C) The amount of particles in a space unit
D) A unit of energy
C) The amount of particles in a space unit
Mass is defined as the amount of particles in a space unit (ex: grams, kg, ounce, pound, ton etc.)
True or False (T/F)
Potential energy can change into kinetic energy and then back into potential energy
True
What is the formula for Kinetic Energy?
A) d/t
B) mgh
C) PE+KE
D) 1/2mv2
D) 1/2mv2 is the formula for Kinetic Energy
Which of the following is a unit of speed?
A) N
B) Kg
C) M/S
D) ma
C) M/S (Meters per second) is a unit of speed
Fill in the blank
For every action there is _________....
A) Touching, an action, and a reaction
B) A force that disappears instantaneously
C) An equal and opposite reaction
D) A smaller reaction
C) An equal and opposite reaction
For every action there is an equal and opposite reaction
Newtons 2nd Law
What is the difference between speed and velocity?
A) Velocity has direction
B) Velocity is faster than speed
C) Speed has direction
D) They are measured in different units
A) Velocity has direction
Velocity = distance / time + direction
Define energy
A) The ability to jump up and down
B) The amount of mass an object has
C) The total capacity of potential energy in a system
D) The capacity to do work or the ability to cause change
D) The capacity to do work or the ability to cause change is the definition of energy
What is the formula for potential energy?
A) mph
B) mgh
C) mv2
D) KE - PE
B) mgh (mass x gravity x height)
Which answer is a unit of mass?
A) inches
B) square ft
C) Newtons
D) Kilograms
D) Kilograms (kg) are a unit of mass
What is Newton's second law?
A) For every action there is an equal or opposite reaction
B) An object resists changes in its velocity
C) Force = mass x acceleration
D) No phones in class
C) Force = mass x acceleration is Newton's second law
What are the four types of friction? Sliding, Rolling, Fluid, and (_____)
A) Electric
B) Heavy
C) Static
D) Backwards
C) Static
The four types of friction are sliding, rolling, fluid, and static
What is mechanical energy?
A) The sum of mass in a system
B) The total amount of potential and kinetic energy in a system
C) The sum of only the kinetic energies being expressed
D) The difference of potential and kinetic energy in a system
B) The total amount of potential and kinetic energy in a system is mechanic energy
ME=PE+KE
What is the formula for acceleration?
A) Vf - Vi / t
B) s/t
C) ma
D) d/t
A) Vf - Vi / t
What is the unit for potential and kinetic energy?
A) m/s
B) Newtons
C) Cal
D) Joule
D) Joule (J)
Potential and Kinetic energy are measured in units of Joules.
What is the name of this law? "Energy cannot be created nor destroyed"
A) Potential Energy Law
B) Newtons 1st Law
C) Law of Inertia
D) Law of Conservation of Energy
D) Law of Conservation of Energy
Mrs. Hansel punches a bag with a mass of 60 kg at an acceleration of 15m/s2. Calculate the force applied.
A)900
B) 4 N
C) 60kg
D) 900N
D) 900N is the total force applied
60kg x 15 m/s2 = 900 N
Determine if the following are examples of potential energy (PE) or kinetic energy (KE)
1.) A boulder is sitting at the edge of a cliff (P/K)
2.) A battery (P/K)
3.) A person running (P/K)
1.) P -Potential energy
2.) P-Potential energy
3.) K- kinetic energy
An airplane travels 2.3 meters in 15 seconds to the west, what is its velocity?
What formula would you use to solve this?
A) mgh
B) Vf - Vi / t
C) ma
D) d/t
D) d/t would be used to solve for velocity
Mrs. Hansel punches a bag with a mass of 30(?) at an acceleration of 3(?). What are the proper units for this problem?
Force (F) = 30(__) x 3(__)
F= 90(__)
A) (m/s), (kg) , (F)
B) (m/s2), (N) , (Kg)
C) (kg), (m/s2), (N)
D) (kg), (m/s), (N)
C) (kg), (m/s2), (N)
Force (F) = 30(unit of mass) x 3(unit of acceleration)
F= 90(N)
Which of the following is representative of Newton's second law?
A) An object resting
B) newtons = kilograms x m/s2
C) f= mgh
D) action = reaction
B) newtons = kilograms x m/s^2
A box has 10 N of force being pushed to the right and 4 N of force being pushed to the left?
What is the direction and Net Force on the box?
A) 14 N RIGHT
B) 6N RIGHT
C) 40N LEFT
D) 6N LEFT
B.)6N RIGHT. The direction of the force is to the right. The net force on the box is 6N.
10N (right) - 4N (left) = 6 N right
You must exert a force of 5 N on a book to slide it across a table. If you do 10 J of work, how far have you moved the book? Hint: W=F/D D=W/F F=W/D
A) 2 meters
B) 50 meters
C) 15 N
D) 2 N
A) 2 Meters
D=W/F (distance = work/force)
distance=10J/5N=2 m