Question

What is the minimum force required to increase the energy of a car by 92 J over a distance of 19 m? Assume the force is constant.

Group of answer choices

1700 N

110 N

0.21 N

92 N

4.8 N

Answer 1

W= ∆E
&
W=Force x displacement

If you increase energy by 92J you are changing energy by 92 so ∆E=92J

Work= ∆Energy
So W also =92


Work=Force x displacement
92=F x 19
F= 92/19
F=4.84 N

Answer: 4.8N (last option)