Sunday

March 29, 2015

March 29, 2015

Posted by **t** on Thursday, June 23, 2011 at 2:19pm.

- physical science -
**drwls**, Thursday, June 23, 2011 at 2:34pmThe work required is

M*g*H = 1000*9.81*40 = 3.92*10^5 Joules

A 20 HP motor can provide 20*746 = 14,920 watts (J/sec) of power.

Time= Work/Power

I get 26.3 seconds

**Answer this Question**

**Related Questions**

science - How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from...

Physics - An electric motor is rated to have a maximum power output of 0.72 hp. ...

Physical Science - an initially stationary 15.0 kg crate of cheese wheels is ...

physics - How long will it take a motor 1500 watt motor to lift a 500kg elevator...

physical science - how much power is required to lift the crate

physics - A crate of mass m (=40 kg) is placed at rest on a (frictionless) ...

physics - A worker in a warehouse uses a rope passing through some pulleys to ...

physics - How long will it take a 1630 W motor to lift a 285 kg piano to a sixth...

physics - How long will it take a 1030 W motor to lift a 330 kg piano to a sixth...

Physics - How long will it take a 1830 W motor to lift a 285 kg piano to a sixth...