2. use the v-t graph of the toy train in figure 9 to answer these
questions.

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages