A boy of mass 60 kg and a girl of mass 40 kg are together and at rest on a frozen pond and push each other apart. The girl moves in a negative direction with a speed of 3 m/s. What must be the final velocity of the boy?

a car traveling at 40m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is the acceleration?

A tetherball is tied to the end of a string of negligible mass. The ball is struck so that it moves in uniform circular motion in a horizontal plane, and the string makes an angle of 26° with the vertical pole. The mass of the ball is 1.3 kg.

A string is stretched by two equal but opposite forces f newton each what is tension in string

A 10-solar-mass main-sequence star will produce what types of remnants?

If you get caught in a strong current in a river you should roll onto your back and float downstream feet? True or False

What areas of the work force can science be applied to

Rank from fastest to slowest the following waves according to their speed of propagation: A. An earthquake wave B. A tsunami C. A sound wave in air D. A light wave

William Ferrel: introduced significant wave" forecasting measured under-surface currents using a current drag created a tide-prediction machine developed the first sonar device

A superhero flies 285 m from the top of a tall building at an angle of 35◦ below the horizontal. What is the horizontal component of the superhero's displacement?

Work occurs when an applied force results in movement of an object in the same direction as the applied force. an object is subjected to balanced forces resulting in movement of the object.