If a business was made up of ten large pickup trucks and the workers had to back them under a machine lifting bails of hay to be lowered into the truck bed, which simple machine would be best for the job?

Why isn't earths moon considered a planet

A grandfather clock is constructed so that it has a simple pendulum that swings from one side to the other, a distance of 27.0 mm, in 1.00 s. What is the maximum speed of the pendulum bob?

An object with a positive velocity and a negative acceleration will ...

True or false, only a radioactive isotope will have a half-life

Which of the following statements is FALSE about collisions? (Consider Newton's Laws an the Conservation of Momentum.

A spring has a spring constant of 120 newtons per meter. Calculate the elastic potential energy stored in the spring when it is stretched 2.0 centimeters.

In pottery class, you throw a pot from a lump of wet clay. your pot's mass is 5.5 kg. after the pot is fired, it's mass is 4.9 kg. the density of wet clay is 1.60 g/cm3 and the density of fired clay is 1.36 g/cm3.

When you catch a baseball, what kind of work do you do, negative or positive? By catching the baseball, what do you change? Does the baseball gain or lose energy? What kind of energy?

A man finds that he has a mass of 100.6 kg. He goes on a diet, and several months later he finds that he has a mass of 96.4 kg. Express the mass 100.6 kg in scientific notation.

A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?