The advantage of using a machine is that we apply less ??? at the input for the work done at the output. Please fill in the question mark area...Thank you much appreciated.

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

What is the magnitude of the resultant vector round your answer to the nearest tenth

Explain the consequences of this addiction to the brain tissue