A ball is thrown horizontally from the roof of a building 56 m tall and lands 45 m from the base. What was the ball's initial speed?

Descomposition is a physical changes

The length of a rectangular sheet of metal decreases by 34.5 cm. Its width decreases proportionally. If the sheets original width was half the original length and the new area of the sheet is 1.

A small car with a mass of 800. kg is moving with a velocity of 27.8 m/s. What is the momentum of the car? What velocity is needed for a 2400. kg car in order to have the same momentum?

A 20kg suitcase on a flat surface is pushed by a force of 100N downwards at an angle of 60 degrees with the horizontal. The suitcase moves along the floor. What is the normal force from the floor to the suitcase?

The compressor in a certain Carnot refrigerator performs 580 J of work to remove 150 J of heat from the interior of the refrigerator. How much heat must the coils behind the refrigerator discharge into the kitchen?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?

How Long will it take a plane flying north from Miami to reach New York City 1800 km away if the average velocity of the plane is 940 km/h