A 50 kg object traveling at 100 m/s collides (perfectly elastic) with a 50 kg object initially at rest. What is the sum of the momentum of both objects prior to the collision?

a. 100 kgm/s b. 500 kgm/s C. 5,000 kgm/s d. 100,000 kgm/s​

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

Aspacecraft that renters the earth’s atmosphere drastically slows down. the amount of kinetic energy the spacecraft has as it reenters the earths atmosphere