Starting from rest, a horse pulls a 263−kg cart for a distance of 1.6 km. it reaches a speed of 0.38 m/s by the time it has walked 50.0 m and then walks at constant speed. the frictional force on the rolling cart is a constant 253 n. each gram of oats the horse eats releases 9 kj of energy; 10 % of this energy can go into the work the horse must do to pull the cart. how many grams of oats must the horse eat to pull the cart?

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next