You are trying to get a kite out of a tree by throwing another ball at it. the kite is 13.2 m high. assuming you have great accuracy, what initial velocity is required to hit the kite?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton