Mathematical Conventions (Topic 1)
Speed, Velocity, & Acceleration (Topics 2-4)
Work, Force, & Acceleration (Topic 5)
Energy
(Topic 6)
(Topic 6)
Anything Goes!
(all topics)
(all topics)
100
The formula E_p = mgh rearranged to solve for h
What is
h = (E_p)/(mg)?
100
The average speed of a car (in km/h) that travelled 297 km in 2 1/2 hours. Put your answer in 3 significant figures.
What is 119 km/h
100
The amount of work done by a student walking 8.8 m while applying a force of 67 N to the textbooks they are carrying.
What is 0 J of work?!
100
The units of energy.
What are Joules (J)?
100
Quantities that include magnitude but no direction. Speed, for example.
What are SCALAR quantities?
200
The number of significant figures in 0.0340
What is 3?
200
Calvin is running away from a bee. He runs 84 m[N], then turns around and runs 26 m [S].
What is Calvin's displacement?
vecd = vecd_2-vecd_1
vecd = 26 m - 84 m = - 62 m = 62 m[N]
200
The formula for finding work
W=Fd
200
The physics law that states "Energy cannot be created or destroyed, only converted from one form to another."
First Law of Thermodynamics
200
What is 50 km/h in m/s.
14 m/s
300
The value 235,987 written in 3 significant figures.
What is
2.36*10^5 ?
300
The units of acceleration.
What is
m/s^2 ?
300
A student carries a 12 kg backpack while walking 15 meters forward down a hallway. The student holds the backpack steadily, applying an upward force of 117.6 N (equal to the weight of the backpack), but the backpack moves horizontally. Calculate the work being done on the backpack.
The student is not doing work on the backpack. Although the student applies an upward force of 117.6 N to hold the backpack, the displacement is 15 meters forward (horizontal). Since the force and displacement are not in the same direction, the work done by the student on the backpack is zero, according to the physics definition of work.
300
The type of energy a roller coaster car has at the very top of the roller coaster.
What is gravitational potential energy?
300
The type of motion that involves traveling at a constant speed in the same direction.
What is uniform motion?
400
The formula E_k = 1/2mv^2 rearranged to solve for m .
What is
m = (2E_k)/(v2) ?
400
The final velocity of a car entering the highway at 4.30 m/s and accelerating at a rate of 1.6 m/s^2 for 21.4 s.
What is 39 m/s or 3.9 x 101 m/s?
400
The distance a box is pushed if a person does 838 J of work and applies 323 N of Force
What is 2.59 m?
400
The vertical height of a 345 g bird perched up in a tree if it has 29.0 J of gravitational potential energy.
What is 8.57 m?
400
56 km/h converted to m/s
What is 16 m/s or 1.6 x 101 m/s?
500
The formula
E_k = 1/2mv^2
rearranged to solve for v .
W h a t i s
v = sqrt((2E_k)/m)
or
v = sqrt(E_k/(0.5m)) ?
500
The order of the following events as depicted in the graph below. Assume East is positive.
A - Hobbes has stopped moving
B- Hobbes walks West
C- Hobbes walks East past the starting position
What is C, B, A?
500
The amount of work done over the 10.0 m.
What is 42 J?
500
A crane lifts a metal beam to the top of a construction site 15.0 m above the ground. The crane does 1.20 × 10⁴ J of work to lift the beam. The crane operates at 60.0% efficiency.
calculate the mass of the metal beam.
48.9 kg.
500
A student uses a pulley system to lift a 25 kg box to a shelf 2.0 meters high. It takes 600 J of energy input to complete the task.
Step 1: Calculate the useful work output (the gravitational potential energy gained by the box).
Step 2: Use your answer to calculate the percent efficiency of the system.
Step 1: Calculate Work Output (gravitational potential energy):
W output=mgh=490J
Step 2: Calculate Percent Efficiency= 82%