Work done and Power

The SI unit of force is __________.

• newton (N)

• pound (lb)

• erg

Power is the product of force to ___________.

• displacement

• velocity

• mass

The unit watt-second is the same as _____________.

• volt

• joule

• newton

A boy will use more power in _______.

• running up the stairs

• walking up the stairs

• the same in both

1 hp is equal to _________ erg s^-1.

• 746

• 746 x 10^-7

• 746 x 10⁷

The product of mass to acceleration is _______.

• energy

• force

• momentum

There are ______ ft-lbs^-1 in 1.2 hp.

• 660

• 48

• 895

The work done by a force is given by W=F s cosθ.If θ is ____ degree , the work done is maximum.

• 30

• 60

• 0

One kilowatt is equal to ______MW.

• 10³

• 10^-3

• 10⁶

Large power machine consume ______ fuel.

• more

• less

• no more