A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?
A) 18 W
B) 22 W
C) 24 W
D) 27 W
A
You might also like to view...
Astronomers measured the location of the Sun in the Milky Way Galaxy by
A. counting the number of stars. B. plotting the position of O and B stars. C. plotting the position of globular star clusters. D. plotting distribution of water molecules.
An electron inside a hydrogen atom is confined to within a space of 0.110 nm
What is the minimum uncertainty in the electron's velocity? ( h = 1.055 × 10-34 J ? s, mel = 9.11 × 10-31 kg) A) 1.05 × 106 m/s B) 1.05 × 108 m/s C) 1.50 × 106 m/s D) 1.05 × 1010 m/s E) 1.50 × 108 m/s
Two parallel wires carry currents in the same direction and exert a force on each of magnitude F for each meter of length. One of the currents is now reversed in direction and doubled in magnitude. What are the resulting magnitude for the force per meter of length and its direction relative to the wires?
1.2F, attractive 2.2F, repulsive 3.4F, attractive 4.4F, repulsive
The percentage by mass of carbon in diamond is about
a. 25%. b. 75%. c. 100%. d. 20%.