What happens when a roller coaster car moves down from the top of a hill?

What is the best term used to describe a vehicle hitting another object?

A double threaded right handed worm gear transmits 15 hp at 1150 rpm. The pitch of the worm is 0.75 inches and pitch diameter of 3 inches. The pressure angle is 14 1/2° and the coefficient of friction is 0.12. Find the worm gear efficiency.

why can we use P=VI in the question electric bulb base generator is rated 220 volts and 100W when it is operated on 110v what will be its power consumed?

Which of the following is not true about the Global Positioning Systems (GPS) ? a. GPS can determine the composition of soil on mountain ranges. b. GPS can determine latitude and longitude of a given area. c.

What type of energy transformation happens in hydro-electric power?

As you catch a fast-moving fastball, why is it wise to move yourhand in the direction of the ball's motion? Explain in terms ofwork and energy.

What is the dot product of a = - 2i - 5j and b=i - 4j

A race car driver must average 200 km/hr for four laps to qualify for a race. because of engine trouble, the car averages only 170 km/hr over the first two laps. what average speed must be maintained for the last two laps?

A machine has a mechanical advantage of 5. if 300 newtons of input force is used to produce 3,000 newton meters of work what is the output force and what is the distance over which the work is applied

An experiment in your science class lists the materials needed for the lab. It is your job, as a lab partner, to measure out 25 mL of distilled water and 2.5 grams of magnesium.