What is another word for the sound barrier?

This diagram shows the movement of a skater at 1-second intervals. What is the magnitude of the average velocity, in m/s, if the skater went for a total of 12 meters? A) 3 m/s B) 4 m/s C) 12/5 m/s D) 48 m/s

What kind of simple machine is a swing

When a muscle is stretching by a contraction of the opposing muscle it is called

At the horizontal distance 33m from the bottom of a tree the angle of elevation to the top of the tree is 25 degrees. How tall is the tree?

Describe a situation where you might have high velocity but low acceleration

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?

Rauol's friend Johnny sets out from his house in the city. His displacement is 900 m 80° North of west. What is the x component of his displacement vector?

What is the relationship between gravity and mass? What is the relationship between gravity and distance?

A person performs 300 j of work over the course of 60 seconds how much power they did required