A crowbar is being used with an actual mechanical advantage of 8. If the input force is 400 Newton’s on the 0.3 meter long end of the crowbar, what is the output force on the short end? a) 960 N
b) 50N
C) 3,200 n
D) 120 n

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm