One model of tennis ball launcher has advertised that it is capable of imparting 15,000 J of kinetic energy to a 0.5 kg ball initially at rest. A student carefully measures the compression of the spring to be 0.10 m. What is the value of the spring constant for the tennis ball launcher according to the data provided?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

Which of the following is not a physical property of mattera. melting pointb. heat of combustionc. viscosityd. boiling point