How does a fixed pulley act as a machine?

Do rolling down a grassy hill has kinetic energy or potential energy

A scooter is moving with a speed of 18 m/s. Its mass is 20 kg. What is the magnitude of its momentum?

The electrical force on a charge of 2 C is 60 N. What is the value of the electric field at the place where the charge is located?

Thorium-229 is a highly radioactive isotope used in the treatment of certain cancers. Use the chart to determine how much thorium would remain after 7,340 years if a sample began at 20 pounds of pure Th-229.

A light-year is the distance that light can travel in one year. If the sun is 1.5 x 10⁸ km away, how many light years is the sun from earth? Assume that light travels at a speed of 3.0 x 10¹⁰ cm/s.

During sublimation particles in a solid room deodorizer move directly into the air as a gas how does the movement of the deodorizer particles change? the particles ___.

A 50-g ball rolls across the table at 2 m/s. A 100-g ball rolls across the same table at 1 m/s. Which ball has more momentum?

The cross section area of a hole is 725cm^2. Given that the area of a circle is A=3.14r^2, find the radius of the hole.

How long does it take the moon to go from full-moon phase to new-moon phase

What is the rule of calculation of elastic potential energy?