Because after each impact it loses a fraction of its original energy, because it gets transfered to the floor. this is the reason that a perpetual motion machine is impossible. you cannot have infinite energy, because to perform a task, energy must be spent. hope i helped :3
Answer:
Power = 56.25 W
Explanation:
Power = workdone/time taken
We are given;
Mass; m = 50 kg
Final velocity; v = 3 m/s
Time; t = 4 s
Workdone = ½mv² = 1/2 × 50 × 3²
W = 25 × 9
W = 225 J
Thus;
Power = 225/4
Power = 56.25 W
Answer:
1. the graph is showing the speed of the object at different times.
Explanation:
2. the object is slowing down
Gravity!! It also keeps the planets in orbit!
Answer: The average speed is 5.71 m/s
Explanation:
The average speed in this run will be the quotient between the total distance that the runner traveled, and the total time it took.
Distance = 400m + 400m + 800m = 1600m
Time = 80s + 70s + 130s = 280s
Then the average speed is:
S = 1600m/280s = 5.71 m/s