Mathematical Conventions
Speed, Velocity, and Acceleration
Work and Force
Energy
Anything goes
100
The formula Ep=mgh rearranged to solve for h
What is
h=Ep/mg
100
The average speed of a car (in km/h) that travelled 297 km in 2.5 hours. Put your answer in 3 significant figures
What is 119 km/h
100
The formula for finding work
W=Fd
100
The units of energy.
What is 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?
What is 58 m[N]
200
The amount of work done by a student pushing a desk with a force of 67 N for 8.8m (to 3 sig digs)
What is 590 J
200
The physics law that states "Energy cannot be created or destroyed, only converted from one form to another."
What is the First Law of Thermodynamics
200
What is 50 km/h in m/s
14 m/s
300
The value 235987 written in 3 significant figures.
What is
2.36 x 105
300
The units of acceleration.
What is m/s2
300
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
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 Ek=1/2mv2 rearranged to solve for m
What is 2Ek/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/s2 for 21.4 s.
What is 39 m/s or 3.9 x 101 m/s?
400
A machine does 2.00 x 104 J of work in lifting an object. If the force exerted by the machine was 1.20 x 103 N, how high did the machine lift the object? (answer in 3 sig digs)
What is 16.7m
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
Janet was clocked going 30 m/s in a 60 km/hr zone. What was her speed, and was she speeding?
What is 108km/hr. Yes she was speeding
500
The formula Ek=1/2mv2 rearranged to solve for v
What is v=√2Ekm
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 first 6.0 m
What is 36 J
500
The speed of 3.4 kg a rock just before it hits the water at the bottom of a 4.0 m cliff
What is 8.9 m/s
500
The fundamental units of the Joule (J) (the units that make up the Joule)
What is a Newton Meter (Nm= J)