Work And Energy Test

Result

Work And Energy Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

a wheelbarrow is an example of a lever of

A
1^st order

B
2^nd order

C
3^rdorder

D
none of the above

Solution

A second-class lever or a 2nd order lever is a stick where the fulcrum is at one end of the stick, you push on the other end, and the weight is in the middle of the stick. Some common second-class levers are doors, staplers, wheelbarrows, and can openers. Thus, a wheelbarrow is a 2nd order lever.
Question 2
1 / -0

Which of the following does not represent a simple machine?

A
Lever

B
Pulley

C
Gear

D
Steam engine

Solution

Steam engine is not a simple machine as compared to a lever, pulley and a gear.
Question 3
1 / -0

A tape-recorder records sound in the form of

A
electrical energy

B
magnetic field on the tape

C
variable resistance on the tape

D
sound waves held on the tape

Solution

A tape recorder records sound in the form of magnetic field on the tape.
Question 4
1 / -0

Water is falling from the top of a high water fall. On falling,

A
it evaporates

B
it freezes

C
there is no change in its condition

D
it gets slightly warmed up

Solution

Water falling from the top of a waterfall gets slightly warmed up because some of the KE possessed by it is converted to heat energy upon striking the ground.