Your family is moving to a new home. while lifting a box 1.5 m straight up to put it
on a truck, you exert an upward force of 200 n. calculate the amount of work you
did.
a.300
b.133 j
c.201.5 j
d.198.53

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm