A clever engineer designs a "sprong" that obeys the force law Fx=-q(x-xe )3, where xe is the equilibrium position of the end of the sprong and q is the sprong constant. For simplicity well let xe=0 Then Fx=-qx3.
a) What are the units of q?
b) Draw a graph of Fx vs. x.
c) Find an expression for the potential energy of a stretched or compressed spring.
d) A sprong-loaded toy gun shoots a 20g plastic ball. What is the launch speed if the spring constant is 40,000, with the units you found in part a, and the spring is compressed 10 cm? Assume the barrel is frictonless.

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

small = small current large mag large current

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards