Acar of mass m1 stopped at a traffic light is rear-ended by a car with mass m2. the cars become entangled. the second car was moving at a velocity of v2 before the collision. what is the kinetic energy of the system after the collision?

What is the maximum acceleration of the wing tips, in units of g?

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.