The propeller of a 90-horsepower outboard motor rotates at exactly 2000revolutions per min. Find the angular speed of the propeller in radians per sec.

Answer 1

1 rpm=(∏/30)(rad/sec)

2000 rpm=2000*(∏/30)(rad/sec)

2000*(∏/30)(rad/sec)=200∏/3 rad/sec is the exact answer

you cans also multiply 200 times ∏ and divide by 3

200∏/3=628.31853/3=209.43951≈209.44 rad/sec

Answer 2

2000 rpm

4000π rpm

66 2/3 π rps

or

209.4 rps

Answer 3

1 rev = 2pi rad. 1 min = 60 s. Use these two conversions to get to rad/s.

2000 rev/min * 1min/60s * 2pirad/1rev = xx rad/s