An ostrich can run at speeds of up to 72 kilometers per hour. How long will it take an ostrich to run 1.5 kilometers at this top speed?

When the only force affecting an object is gravity, that object is

The magnitude of the momentum of a runner is 346.5 kg•m/s. If the runner has a speed of 4.5 m/s, what is his mass? A. 73 kg B. 77 kg C. 88 kg D. 82 kg

Which is the term used for a change in the magnitude of the velocity

What will happen to a material made of rubber if struck by lightning

If a vibrating string is made shorter (i. e., by holding your finger on it), what effect does

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased

A 65-year-old male enters the hospital with high blood pressure, damaged lungs, low blood-oxygen concentration, and throat cancer. What are all of these symptoms associated with?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.

A hydraulic lift is used to lift a heavy box that is pushing down on a 1.5-m2 piston with a force of 1,700 N. What force needs to be exerted on a 0.12-m2 piston to lift the box?