Answer: a= 2 m/s²
Explanation: acceleration = change of speed/ time = 20 m/s / 10 s
Efficiency = 45J/120J = 0.375
Or
0.375 * 100% = 37.5 %
When a person jumps from a tree to ground, what happens to the momentum of the person upon striking the ground is that it is transferred to earth. The momentum is not lost, it is conserved by being transferred to the ground. But it can also be lost to the impulse.
D, all of these are voltage sources. A battery can power small things, generators can power larger things, and outlets can charge, or power things.
