A 900-N lawn roller is to be pulled over a 5-cm (high) curb. Radius of roller is 25 cm. What minimum pulling force is needed if angle made by handle is (a) 0 deg (b) 30 degrees?

Some windows are made with a single pane of glass. Other windows are made out of two panes that have a tiny pocket of air trapped between them.

A laptop computer uses 78.0 W of power. If it runs for 10.0 minutes how much energy does it use?

An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 452 Hz when the train is approaching him and 442 Hz when the train is receding from him.

What criteria do astronomers use to classify an object as a planet

What is the power input needed for 70kg person to go up 5 m of stairs in 2 seconds

Which one of Newton's Laws fits this statement: More mass means more force need to accelerate?

What type of relationship occurs when one variable decreases while the other variable increases?

The best way to prevent heat exhaustion while exercising is to

The highest frequency radio waves are which type?

When a mass is placed on a spring with a spring constant of 15 newtons per meter, the spring is compressed 0.25 meter. How much elastic potential energy is stored in the spring?