QB3b. For the problem above write down an expression of the velocity of the point A as a function of time t. Please use appropriate algebraic symbols for multiplication (* for a × b), division (/ for a/b), exponents (a^b for a³), square root (sqrt(a*b/c) for √a × b/c) etc. For Greek letters use their names e.g. "theta", "alpha", "pi", "mu" (without the quotes) and for trigonometric functions use "cos", "tan", "sin" (without the quotes). Thus for Acose use A*cos theta. Please use the "Display response" button to check you entered the answer you expect. V= QB3a. A satellite is moving with a constant angular velocity (see sketch below). Write down an expression for the displacement S (projected onto the line PN) as function of time t if the starting point of the motion is at the point N (top of the circle), the radius of the satellite's orbi is R and its rotational frequency is f. Please use appropriate algebraic symbols for multiplication (* for a × b), division (/ for a/b), exponents (a^b for a³), square root (sqrt(a*b/c for √ax b/c) etc. For Greek letters use their names e.g. "theta", "alpha", "pi", "mu" (without the quotes) and for trigonometric functions use "cos", "tan", "sin" (without the quotes). Thus for Acose use A* cos theta. Please use the "Display response" button to check you entered the answer you expect. S N A P Satellite R W