Acompound machine is sued to lift a car. if you apply a force of 60 n to the machine, it lifts the car with a force of 550 n.

a. what is the mechanical advantage of the machine?

b. the machine has an efficiency of 35%. if you perform 1150 j of work, how much useful work does the machine do?

Fitness is the ability to perform only very light levels of physical activity.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction