Distance, Displacement, Speed
The total amount traveled is called the
distance
A car starts from rest at a stop light and reaches 40 m/s in 3.5 s. Determine the acceleration of the car.
11.4 m/s2
The total potential and kinetic energy of an object is called.
mechanical
Changes in forms of energy are called energy
transformation
The amount of potential and kinetic energy in the particles of an object
thermal energy
Displacement
Find the weight of a 15 kg rock. Acceleration due to gravity is 9.8 m/s2.
147 N
A 4-kg hammer is dropped on to a nail from a height of 0.5 m. If no heat is generated, What is the maximum energy that can be transferred to the nail?
19.6 J
Me eating an apple and then running is what energy transformation
chemical to kinetic (mechanical)
Name the three forms of thermal energy
conduction
convection
radiation
What is the formula for speed?
S=D/T
The tendency to resist change
Inertia
A car that is resting on the top of a cliff slips over the edge and accelerates towards the ground. As the rock falls, the amount of kinetic energy
increases
What form of energy flows between the wires that powers your tv?
electrical
Getting hot by a fire is from which form of thermal energy transfer
radiation
A diagonal line on a distance vs time graph means that the speed is
constant
An object in motion will stay in motion unless acted upon by what type of force?
unbalanced
Why would you have more potential energy from the same height on Jupiter?
More gravity
What energy is used to allow your cell phone to communicate with other phones.
electromagnetic
At 32 degrees Fahrenheit, water will
A person travels 33 meters in 3 seconds. What is their speed?
11 m/s
Why is a merry-go-round at constant speed accelerating?
Change in direction.
At what point in a roller coaster would you have the highest potential energy?
The top of a hill.
A battery is connected to a motor. The battery releases enough energy to perform 200 J of work, but the motor produces only 90 J. Why?
Some is released as heat.
The specific heat of copper is 0.75 J/g K. How much heat is lost as a 150 gram sample of copper is dropped into a beaker of water and its temperature drops from 100°C to 30°C?
7875 J