What is the mass of a truck if it is accelerating at a rate of 7m/s2 and hits a car with a force of 6,500N?

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?