A machine that uses 200 watts of power moves an object a distance of 15 meters in 25 seconds. What is the force needed and the work done by this machine?

Question

13879 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-12-08T14:23:05

(a)

#333.3"N"#

(b)

#5"kJ"#

(a)

Power is the rate of doing work.

#P=W/t#

#:.W=Pxxt#

Work done is force x distance moved in direction of force.

#W=Fxxd#

#:.Fxxd=Pxxt#

#:.F=(Pxxt)/d=(200xx25)/15=333.3"N"#

(b)

Since #W=Fxxd#

#W= 333.3xx15=5000"J"=5"kJ"#