Energy
Potential energy at the top =
kinetic energy at the bottom!
example of conduction
heating popcorn on the stove
What is the coefficient of friction if the Fn of a box is 250N and the Ff is 100 N?
.4
calculate distance: 5 m north, 5 m south
10m
A marble rolls off a 1.5 m high table with a velocity of 2m/s in 2 s. How far away will it land
4m
mechanical energy is
kinetic + potential energy
example of convection
heating popcorn with air popper
What is the coefficient of friction if the Fn of a box is 250N and the Ff is 100 N?
.4
calculate displacment: 5 m north, 5 m south
0
A projectile launched at which angle will have the greatest range?
45
energy of motion
KE
example of radiation
microwaving popcorn
how is mass converted to newtons?
multiple by 9.8m/s2
What is the average velocity of car that travels 400 miles in 4 hours?
100mph
Describe the velocity of a projectile in the horizontal direction.
Energy of position
PE
Thermal energy always moves from
high temp to low temp
what forces act on a book at rest?
gravity & normal force
A baseball is released at rest, hits the ground after falling for 5.87 s. What was the height?
169 m
what happens to velocity in the vertical direction of a projectile
increase
Explain the energy of a roller coaster
highest PE at the top. PE decreases and KE increases as the cart moves to the bottom. PE increases and KE decreases as it goes back up. KE is highest at the bottom.
Which has higher entropy, a solid lead block, or liquid lead?
Liquid lead
Whats the cause of an objects acceleration?
F
What does the slope of a Velocity vs Time graph represent
acceleraton
You launch a dart horizontally off a balcony at 13 m/s. The final horizontal velocity is:
13 m/s