As shown in the diagram below, a child applies a constant 20.-newton force along the
handle of a wagon which makes a 25D angle
with the horizontal.
20. N
25°
Horizontal
How much work does the child do in moving
the wagon a horizontal distance of
4.0 meters?
A) 733
C) 80.J
B) 34 J
D) 5.0 J

Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. the electric field at a point p, which is 0.50 m from the center of the sphere, is 15,000 n/c and is directed radially outward. what is the maximum magnitude of the electric field due to this sphere

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.