What is the mechanical advantage of a

machine that exerts a force of 160 N on

an object when a person exerts a force of

20 N on the machine?

Determine the mechanical energy of this object; a 1-kj ball rolls on the ground at 2m/s a. the ball is on the ground, so the mechanical energy is zero b. 2j c. 1j d. 4j

Technician A says that the HVAC doors in an automatic system are vacuum-operated. Technician B says that the HVAC doors in an automatic system are operated by electric servos.

Race car drivers must slow down as they make turns on the track. This is best explained by the law of inertia. Which statement best describes inertia for the car going around a turn? A) A body in motion stays in motion at the same speed.

A 1400 kg car rear-ends a 200 kg truck. which vehicle experiences the larger momentum change from the collision?

What two minerals would be most useful as grains on sandpaper

A 62 pound box is on an incline. Determine the minimum force P that would result in the box starting to slide up the incline. (include units with answer)

During a collision with another car, the occupants of a minivan initially travelling at 4.0 m/s come to a complete stop in 0.5 s. What was the acceleration of the occupants of the minivan? a) 8.0 m/s2 b) - 8.0 m/s2 c) 2.0 m/s2 d) - 2.0 m/s2

A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.