An arrow is aimed horizontally, directly at the center of a target 20 m away. the arrow hits 0.050 m below the center of the target. neglecting air resistance, what was the initial speed of the arrow?

A car travels down a highway at 25 m/s. An observer stands 150 m from the highway. (a) How fast is the distance from the observer to the car increasing when the car passes in front of the observer? Explain your answer without making any calculations.

A high-jumper, having just cleared the bar, lands on an air mattress and comes to rest. Had she landed directly on the hard ground, her stopping time would have been much shorter.

What does newton's first law predict will happen to a person riding in a car that is moving in circular motion?

You use a lever to lift a heavy tree branch You apply a force of 100 N and the lever lifts the branch with a force of 350 N What is the mechanical advantage of the lever?

What is the total energy of a 175,000kg shuttle orbiting the Earth at 600km above Earth's surface?

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways different?

There are four springs stretched by the same mass. Spring A: 25 cm Spring B: 10 cm Spring C: 100 cm Spring D: 1 cm Which spring is the strongest? A B C D

Consider a rough asphalt roadway with 17 cm curbs and one 3.75 m lane in each direction and a 1.45 m shoulder on each side. The road has a longitudinal slope of 0.75% and is crowned in the center with a transverse slope of 2.25%.

An example of an opinion would be which of the following? bob s burgers is the best show on television. cake is appropriate for many occasions. earth is 238,900 miles from the moon. none of these

Which is a concern about mining for uranium? -Heated water could be released into the environment. -Dust released in the air could be radioactive. -Supplies could become low during a drought.