Work and Energy

In which of these cases is work not done?

• Waiter lifting a dish from a table

• Man holding a heavyweight in the air

• Porter dragging a bag

• All of these

Which of these doesn't need to be fulfilled to say that work is done?

• Force must be applied

• Shape or size changes

• There must be some result seen

• Motion seen must be in the direction of the applied force

Which of these is true?

• W = F x d

• F = W/d

• d = W/ F

• F = W x d

Whom is the SI Unit of Energy named after?

• Sir William Harvard Joule

• James Prescott Joule

• James Prescott Ioule

• John Lawrence Joule

Another unit same as Joule is?

• Pascal

• Nm²

• Nm

• Parsec

1 Mega-Joule = ____

• 1,000,000 J

• 1,000 J

• 1,000,000,000 J

• 10,000,000 J

1 J = ___ erg

• 10⁶

• 10⁷

• 10⁹

• 10⁴

Which of these are forms of energy?

• Natural Energy

• Magnetic Energy

• Chemical Energy

• Electrical Energy

Work does not depend on?

• Distance traveled

• Force applied

• Perpendicular Distance between point of application of force and the object

• Angle between point of application of force and direction of motion

If work done is 1000 J, and force applied is 10 N, what is the distance moved by the object?

• 100 cm

• 100 mm

• 10,000 cm

• 10 m