Kinematic & Newton's Laws
MISC
Energy
Work
Power
100
What is a 'vector'
a quantity having direction as well as magnitude
100
which has more potential energy?? an empty plane or a full plane? (both are flying)
What is full plane
100
definition of kinetic energy?
What is "energy of motion"
100
What is the equation for work?
W= F*d*cos(theta) OR W=f*d
100
What is the definition AND equation of 'power'?
"The rate at which work is done"
power = work/time
OR power = (force*distance)/time
200
A car starts from rest and accelerates at a constant rate of 2 m/s² for 5 seconds. Calculate its final velocity.
vf=vi+at
v-final=10m/s
200
the definition of the law of conservation of energy
the total energy of an isolated system remains constant
200
Formula for potential energy
What is GPE=mass*gravity*height
200
A worker uses a constant force of 50 newtons to push a crate horizontally across a warehouse floor for a distance of 10 meters. Calculate the work done by the worker.
Work (W)=50N×10m×1
Work (W)=500 J
200
Person A and Person B are competing against each other, they both can lift 75 kg boxes 3.5 m off of the ground. Person A lifts her box in 1.5 s and Person B lifts his box in 2.4 s. Which person uses more power??
What is Person A
300
A book is placed on a table. Identify the force(s) acting on the book and its reaction force according to Newton's third law.
Every action has an equal and opposite reaction. So, the force of gravity acting on the book downwards is balanced by the normal force exerted by the table upwards.
300
a rolling ball has 16 J of kinetic energy and is rolling 3 m/s. find its mass.
What is 2 kg
300
position where the potential energy is at its lowest
What is it's 'resting point'
300
I can make you sweat without moving an inch, I can move mountains with just a pinch. Though unseen, my effects are profound, In lifting, pushing, or making sound.
What am I?
What is 'Force'
300
You push down on a 30 N box for 10 minutes. how much power is used??
What is 0 W
400
a 25 kg ball is thrown into the air, going 10 m/s. calculate how high it travels
What is 5 meters
400
Convert 4 miles to kilometers. (Hint: 1 mile ≈ 1.60934 kilometers)
4miles×1.60934km/mile
≈6.43736km
400
KE = 100 J
v = 2 m/s
What is the object's mass??
What is 50 kg
400
Calculate how much work was done if an object is pulled at an angle of 0 degrees down a 6 m path with a force of 13 N.
What is 53 J
400
A motor exerts a force of 1000 N to lift an object 5 meters in 10 seconds. Calculate the power output of the motor.
What is 500 watts
500
A box of mass 20 kg is pushed along a horizontal surface with a force of 50 N. Calculate the acceleration of the box.
f=ma ------------> a=f/m
a = 50N / 20kg
=2.5m/s2
500
How many hours is 2 and a half weeks?
420 hours
500
A bullet with a mass of 0.02 kg is fired from a gun with an initial velocity of 400 m/s. Calculate its kinetic energy.
KE=1/2 * m * v2
KE=1600J
500
Person A and Person B are competing against each other, they both can lift 75 kg boxes 3.5 m off of the ground. Person A lifts her box in 1.5 s and Person B lifts his box in 2.4 s. Which person does more work?
What is NEITHER, they do the same
500
If Aimee does 5.1 J of work to move her dresser drawer a distance of 2.3 m and all of this is done in 8 s, how much power has been exerted??
What is .64 W