If a 25 kg lawnmower produces 347 w and does 9514 J of work, for how much time did the lawnmower run?

Steps 1 and 2)

The variables are W = work, P = power, and t = time. In this case, W = 9514 joules and P = 347 watts.

The goal is to solve for the unknown time t.

Step 3)

Since we want to solve for the time, and we have known W and P values, we use the equation t = W/P

Step 4)

t = W/P

t = 9514/347

t = 27.4178674351586

t = 27.4 seconds

Step 5)

The lawn mower ran for about 27.4 seconds. I rounded to three sig figs because this was the lower amount of sig figs when comparing 9514 and 347.

Note: we don't use the mass at all

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

c)as speed changes, wavelength and frequency change.

everything changes!