The second derivative d²x/dt² represents which physical quantity (x = displacement, t = time)?

If y = uv (product of two functions), then dy/dx by product rule is:

For the function y = eˣ, the value of dy/dx is:

The derivative of sin(x) with respect to x is:

If y = xⁿ, then dy/dx is:

Using integration, the work done by a variable force F = kx from x=0 to x=d is: