A mechanic uses a mechanical lift to raise a car. The car weighs 11,000 N. The lift raises the car 2.5 m.

How much work is required to accomplish this task?

A.
4400 J

B.
22,500 J

C.
2.27 x 10-4 J

D.
27,500 J

Question

A mechanic uses a mechanical lift to raise a car. The car weighs 11,000 N. The lift raises the car 2.5 m.
 
 How much work is required to accomplish this task?
 
 A.
4400 J
 
 B.
22,500 J
 
 C.
2.27 x 10-4 J
 
 D.
27,500 J

anonymous · Answer

@JoannaBlackwelder

joannablackwelder · Answer

W=Fd

anonymous · Answer

whats FD?

joannablackwelder · Answer

F is force and d is displacement (F and d have to be in parallel directions.)

anonymous · Answer

how do we figure that out if they didnt give it to us ?

deving7240 · Answer

W is the energy or work so that is joules. F is the force or the weight so Newtons. D is Displacement so Meters.

joannablackwelder · Answer

The movement is in the y-direction since the problem says that the car is being lifted.

deving7240 · Answer

you would plug 11,000 and 2.5  into the equation to get the work

joannablackwelder · Answer

And the weight of the car is the force that must be overcome to move the car vertically.

joannablackwelder · Answer

Which is being pulled vertically by gravity.

anonymous · Answer

so its A?

deving7240 · Answer

no it would be 11,000 times 2.5 not divided so it would be D

anonymous · Answer

ohhhh

deving7240 · Answer

When 2 variables are next to each other they multiply.

joannablackwelder · Answer

:-)

anonymous · Answer

ohh ok thanks

deving7240 · Answer

You're welcome