Suppose you left your lawn mower out all winter, and it is very rusty. of your 250,000j of work, only 100,000j go towards cutting the lawn. what is the efficiency of the lawn mower now?

a 40%
b 0.4%
c 0.04%
d 4%

reminder: show your !

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?