Vocabulary
Range
What is the unit for velocity?
m/s (meters per second)
What is the formula to find the potential energy of an object?
PE=mgh
What is the range of a projectile thrown off a cliff that was in the air for 4 seconds?
160 m
What is it called when the total energy stays constant, and that it can only be changed?
Conservation of energy
What is the word for the energy transferred through the force enacted on an object over a distance?
Work
What is the unit for acceleration?
m/s² (meters per second squared)
What is the formula to find the kinetic energy of a moving object?
KE=½mv²
A car brakes after moving at 60 km/hr and skids 17 m to a stop. How much father would it skid if its initial speed was 120 km/hr?
68 m
The potential energy of a falling object right before it hits the ground is...
What is the word for the rate at which work is done?
Power
What is the unit for weight or force?
N (Newtons)
What is the formula to find the range of a projectile?
A ball is thrown off the top of a cliff at 13 m/s. 3 seconds after leaving the person's hand, what is the range the ball has travelled?
39 m
If you drop a dart directly above a bullseye on the floor of a train and the train brakes in the middle of the drop, where will the dart land?
A bit ahead of the bullseye
What is the word for the energy that a moving object possesses?
Kinetic energy
What is the unit for Energy?
J (Joules)
What is the formula to find work done?
W=Fd
A 52 kg person stands at the top of a 70 m tall bungee jumping cliff. What is their potential energy?
36,400 J
What is the acceleration of a projectile at the peak of its trajectory?
10 m/s², or g. Gravity never quits that grind 💪
What is the word for the energy an object possesses due to its position, commonly its height?
Potential energy
What is the unit for power?
Watts
What is the formula to find the power used?
P=W/t
A person lifts a 124 kg boulder 2.1 m in 3 seconds. How much power was used?
868 watts
True or false: an object's horizontal motion affects its vertical motion.
False