Atractor ploughing a field accelerates at 2 m/s2
for 10 metres, after which its velocity is 7 m/s.
calculate the tractor's velocity before it started accelerating.

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

What object a collides with object b and bounces back its final momentum is?