Question

A block of mass m = 8.5 kg, moving on a frictionless surface with a speed vi= 9.6 m/s makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 8.5 kg block recoils with a speed of vf= 1.8 m/s the blocks are in contact for 0.20 s. The average force on the 8.5 kg block, while the two blocks are in contact, is closest to:

Answer 1

Answer: it's closest to -331,5N and negativity indicates the direction.

Step-by-step explanation: